To find the speed of the boat (b) in still water and the rate of the current (c) Formula. Let x be how long will it take them if they work together. 2. Bill is working at a rate of 1/2 report per hour and Maria is working at a rate of 1/4 report per hour. However, the last row of Table \(\PageIndex{6}\) indicates that the combined rate is also 1/t reports per hour. Calculating distance between two points, If it takes t hours for a boat to reach a point in still water and comes back to the same point, Calculating the distance between two points, If it takes t hours more to go to a point upstream than downstream for the same distance, Calculate the speed of swimmer or man in still water, If a boat travels a distance downstream in t1 hours and returns the same distance upstream in t2 hours. Job problem. as required by the problem statement. \[\begin{aligned} \color{blue}{10 x}\left(x+\frac{1}{x}\right) &=\left(\frac{29}{10}\right) \color{blue}{10 x}\\ 10 x^{2}+10 &=29 x \end{aligned}\]. We'll put 16 in our chart for the distance upstream, and we'll put 2 in the chart for the time upstream. A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. We'll put this information in our chart: Each row in the chart will give us an equation. If 180 cubic centimeters of water is frozen, by how many cubic centimeters will its volume increase? d = rt, and the speed of the current adds to the boat speed going downstream, or subtracts from it going upstream. Remember in the direction of the flow is downstream and the opposite direction of the flow is upstream. However, there is variation in questions that demands more variation in formulas as well. 3.17.8: Applications of Rational Functions is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. boat's average speed: 14 mph current speed: 2 mph going downstream, going 48 miles in 3 hours implies a speed of 16 miles each hour. That is, the second number is 5. In this section, we will investigate the use of rational functions in several applications. Please upgrade to Cram Premium to create hundreds of folders! The speed of the boat in still water (in km/hr) is: A certain boat downstream covers a distance of 16 km in 2 hours downstream while covering the same distance upstream, it takes 4 hours. Lets check our solution by taking the sum of the solution and its reciprocal. Hence, \[H+4=0 \quad \text { or } \quad H-21=0\]. Here are the important terms every applicant should know: Also Read: Permutation And Combination For Competitive Exams. Thus, our two numbers are x and 2x+1. Making educational experiences better for everyone. Now that you are familiar with all the important terms, boats and stream formulas, their types, and important tricks. {"cdnAssetsUrl":"","site_dot_caption":"Cram.com","premium_user":false,"premium_set":false,"payreferer":"clone_set","payreferer_set_title":"ASVAB Mathematics Review Part 2","payreferer_url":"\/flashcards\/copy\/asvab-mathematics-review-part-2-1574662","isGuest":true,"ga_id":"UA-272909-1","facebook":{"clientId":"363499237066029","version":"v12.0","language":"en_US"}}. Note that the total time to go upstream and return is 6.25 + 3.75, or 10 hours. It takes the same boat 6 hours to travel 12 miles upstream. This is reflected in the entries in the first row of Table \(\PageIndex{5}\). Hence, we want to isolate all terms containing c on one side of the equation. answered 02/17/15, Olubunmi B. Set this equal to 29/10. A boat takes 2 hours to travel 15 miles upriver against the current. Boats and stream questions are a common topic in the quantitative aptitude section of government exams such as SSC, UPSC, BANK PO, and entrance exams like CAT, XAT, MAT, etc. If they work together, it takes them 12 hours. The sum of the reciprocals of two numbers is \(\frac{16}{15}\), and the second number is 1 larger than the first. Legal. What is the speed of the boat in still water? It can go 24 mile downstream with the current in the same amount of time. Mr. Larlham Lets look at some applications that involve the reciprocals of numbers. Let's use the same logic going downstream. Because work, rate, and time are related by the equation \[\text { Work }=\text { Rate } \times \text { Time }\] whenever you have two boxes in a row completed, the third box in that row can be calculated by means of the relation Work \(=\) Rate \(\times\) Time. Q: It takes about 2 hours to travel 24 miles downstream, and 3 hours to travel 18 miles upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is: Problem 12. Each of these linear equations is easily solved. Freshwater, Sydney, NSW 2096, The sum of the reciprocals of the two numbers is 7/10. The speed of the boat as it goes downstream (with the current) will be 4 miles per hour. First, let us explain the meaning of "upstream" and "downstream.". The trip each way is 150 miles. Find the two numbers. Note that we simply invert the number 3 to obtain its reciprocal 1/3. How many hours will it take if they work together? How many hours would it take Amelie if she worked alone? Delhi 110024, A-68, Sector 64, Noida, Katrina drove her car to Boston at a speed of 100 kph (kilometers per hour). 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Thus, the equation we seek lies in the Rate column of Table \(\PageIndex{6}\). a. \[\frac{1}{H}+\frac{1}{H+7}=\frac{1}{12}\]. Boris can paddle his kayak at a speed of 6 mph in still water. The amount of work done is equal to the product of the rate at which work is being done and the amount of time required to do the work. If the boat travels 8 miles downstream in the same time it takes to travel 4 miles upstream, what is the speed of the current? 1] . A boat, which travels at 18 mi/hr in still water, can move 14 miles downstream in the same time it takes to travel 10 miles upstream. We have advice similar to that given for distance, speed, and time tables. It takes Amelie 10 hours to paint the same room. Round your answer to the nearest hundredth. If Jane can do a certain job in 6 hours, but it takes Ana only 4 hours, how long will it take them if they work together? United Kingdom, EC1M 7AD, Leverage Edu How long does it take Hank to complete the job if he works alone? A link to the app was sent to your phone. Unit 3 focuses on interest and loan concepts covered in your reading of Chapter 11: Si Fractions How many floor boards 2 1/4 inches wide are needed to cover a floor 15 feet wide? How many gallons of diet soda were sold? How many hours will it take if they work together? If the speed of the boat in still water is 15 miles per hour, what is the speed of the current? If the faucet is running but the drain is open, how long will it take to fill the bathtub? Geometry Project- 6 x15. How many hours would it take Sanjay if he worked alone? per hour. Maria can finish the same report in 4 hours. Let x be that time. that distance. This leads to the entries in Table \(\PageIndex{7}\). Uttar Pradesh 201301, Devonshire House, 60 Goswell Road, If they work together, it takes them 10 hours. Please sign in to share these flashcards. Going upstream, Distance = (Rate)(Time), so 16 = (B-C)(2) . If the speed of the boat in still water is 15 miles per hour, what is the speed of the current? No tracking or performance measurement cookies were served with this page. in the chart for the time downstream. A nice application of rational functions involves the amount of work a person (or team of persons) can do in a certain amount of time. . It will take 30 hours to travel 60 miles at this rate. Find the two numbers. Multiply both sides by the common denominator (32 c)(32 + c). Find the two numbers. Example The speed of the boat when traveling downstream is 32 km/hr. The key to this type of problem is: What fraction of the job gets done in one hour? Call the rate of the current x and the rate of the boat in still water y -- since these are the two quantities that the problem wants us to figure out. A boat can travel 16 miles up a river in 2 hours. We start by recalling the definition of the reciprocal of a number. . For any nonzero real number a, the reciprocal of a is the number 1/a. Australia, Leverage Edu Tower, To see the equation, pass your mouse over the colored area. The sum of the reciprocals of two consecutive odd integers is \(\frac{16}{63}\). Their reciprocals, respectively, are 1/x and 1/(2x + 1). Together, they can complete the same job in 12 hours. Get a free answer to a quick problem. This was all about the Boats and streams formula. We can make the numbers a bit smaller by noting that both sides of the last equation are divisible by 10. For the latest updates around study blogs, you can follow us on Instagram, Twitter, Facebook and also subscribe to our newsletter. If the speed of the boat in still water is 10 mph, the speed of the stream is: 2 mph; 2.5 mph; 3 mph ; 4 mph; None of These; Answer: 2 mph . A boat takes 2 hours to travel 15 miles upriver against the current. Thus, Hank is working at a rate of 1/H kitchens per hour. \[x=\frac{5}{2} \quad \text { or } \quad x=\frac{2}{5}\]. It takes you the same amount of time to travel 15 miles downstream, with the current, as 9 miles upstream, against the current. Let's say I'm in a 10 mph current in a canoe. Downstream- When the boat is flowing in the same direction as the stream, it is called Downstream. Find the speed (mph) of Jacobs canoe in still water. That is, \[\text { Work }=\text { Rate } \times \text { Time. 2005 - 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved. The return trip takes2. hours going downstream. The speed of the boat (b) in still water is 10 miles/hour and the rate of the current (c) is 8 miles/hour. 1] . Find the number(s). A boat can travel 16 miles up a river in 2 hours. What is the speed of the current in miles per hour. A motorboat 5 hours to travel 100km upstream. To set up an equation, we need to use the fact that the time to travel upstream is twice the time to travel downstream. A student gave 2/3 of her cassette tapes to her friend. \[\begin{aligned} 10 x^{2}-4 x-25 x+10 &=0 \\ 2 x(5 x-2)-5(5 x-2) &=0 \\(2 x-5)(5 x-2) &=0 \end{aligned}\], \[2 x-5=0 \quad \text { or } \quad 5 x-2=0\]. She drove back at 75 kph. Dec. 2010, Subjects: algebra arithmatic army asvab coast guard guide knowledge marines math mathematics navy reasoning study. 19 . What is the speed of the current? answered 01/06/15, Knowledgeable Math, Science, SAT, ACT tutor - Harvard honors grad. This is reflected in the entries in the second row of Table \(\PageIndex{5}\). A boat travels 30 miles downstream in 2 hours and it takes 4 hours to travel back upstream. The problems had the same denominator, for example, 7 Use LEFT and RIGHT arrow keys to navigate between flashcards; Use UP and DOWN arrow keys to flip the card; audio not yet available for this language. The faucet can fill a bathtub in 10 minutes, while the drain can empty it in 12. Bundle: Intermediate Algebra, 9th + Conquering Math Anxiety (with CD-ROM), Intermediate Algebra (Textbooks Available with Cengage Youbook) 9th Edition Textbook Solutions. 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning. Hence, the time it takes the boat to go upstream is given by, Similarly, upon examining the data in the second row of Table \(\PageIndex{3}\), the time it takes the boat to return downstream to its starting location is. Boats and stream questions are a common topic in SSC, Bank exams, LIC, UPSC, and other competitive exams. Introducing Cram Folders! What was the interest rate on the loan? Get notified about the latest career insights, study tips, and offers at Leverage Edu. \[\begin{aligned} 180 c &=180 \\ c &=1 \end{aligned}\]. It travels 150 miles upstream against the current then returns to the starting location. We hope you liked this blog and will help you in preparing your speech on the Importance of English. Also Read: A Guide On How to Prepare for Bank Exams. That is, \[a \cdot \frac{1}{a}=1\], For example, the reciprocal of the number 3 is 1/3. Your contact details will not be published. We'll choose the easiest equation The site owner may have set restrictions that prevent you from accessing the site. What is the rate of water's current? If the train covers 120 miles in the same time the car covers 80 miles, what is the speed of each of them? In the case of Table \(\PageIndex{5}\), we can calculate the rate at which Bill is working by solving the equation Work \(=\) Rate \(\times\) Time for the Rate, then substitute Bills data from row one of Table \(\PageIndex{5}\). Jacob is canoeing in a river with a 5 mph current. That will give the equation. The speed of a freight train is 19 mph slower than the speed of a passenger train. The speed of a freight train is 16 mph slower than the speed of a passenger train. Lets look at another application of the reciprocal concept. Problem 9. Water volume increases 9% when it freezes. This agrees with the combined rate in Table \(\PageIndex{8}\). Expand and simplify each side of this result. Solution. Here is the guiding principle. If the speed of the boat in still water is 15 miles per hour, what is the speed of the current? Problem. Find the two numbers. This is an alternate ISBN. Amelie can paint a room in 5 hours. When a boat travels in the same direction as the current, we say that it is traveling downstream. Each of these rates is entered in Table \(\PageIndex{8}\). Block A, Defence Colony, New Delhi, Solution. On a map, 2.5 inches represents 300 miles. Multiple Subject Credential Program Now, speed, or velocity, is distance divided by time -- so many miles per hour: Problem 5. Let "b" represent speed of boat in still water, 3b+3c=24.all sides can be divided by 3 =b+c=8, 4b-4c=16..all sides can be divided by 4 =b-c=4, a Question However, as we saw above, the rates at which they are working will add. You have exactly h hours at your disposal. When traveling downstream speed = boat + current = 20miles in 2 hours = 10miles/hour. How much interest will she receive in one year? Because the total time to go upstream and return is 10 hours, we can write. Please verify. Choose an expert and meet online. The chart will give us the information about distance, rate and time that It takes Ricardo 8 hours longer to complete an inventory report than it takes Amelie. At last, practice makes the students perfect. Stream- The water that is moving in the river is called a stream. We know that Maria does 1/4 reports per hour. If Rajiv rows at his usual rate, he can travel 12 miles downstream in a . If he can paddle 5 miles upstream in the same amount of time as it takes his to paddle 9 miles downstream, what is the speed of the current? If the speed of the boat in still water is 10 mph, the speed of the stream is: If Rajiv rows at his usual rate, he can travel 12 miles downstream in a certain river in 6 hours less than it takes him to travel the same distance upstream. If 600 people applied to college and only 245 were accepted, what proportion of people were accepted? If the current of the river is 3miles per hour, complete the chart below and use it to find the speed of the boat in still water. Solution. Problem 8. }\], A second important concept is the fact that rates add. The passenger train travels 440 miles in the same time that the freight train travels 280 miles. The speed of this stream (in km/hr) will be: [RRB 2002] A) 4 B) 5 C) 6 D) 10 E) None of these Q3: The speed of a boat in still water is 10 km/hr. Leverage Edu Tower, Find the two numbers. of two equations to solve. Going upstream, the boat struggles against the current, so its net speed is 32c miles per hour. . Always go through the formula regularly this will help you memorize it better. Solve the equation d = vt for t to obtain. The sum of a number and its reciprocal is 29/10. It takes Sanjay 9 hours to paint the same room. Rate of current = 2 mph, rate of boat in still water = 6 mph.Answered. Example A person challenged himself to cross a small river and back. Problem 13. 5 May 2016 To check, you can substitute these numbers back into the original problem and confirm that they are consistent with the way the problem was described. How far away was Boston? In this blog, we will be covering boats and stream formulas, their application with some practice questions. Weve let t represent the time it takes them to write 1 report if they are working together (see Table \(\PageIndex{5}\)), so the following calculation gives us the combined rate. Solution. We can calculate the rate at which Hank is working alone by solving the equation Work \(=\) Rate \(\times\) Time for the Rate, then substituting Hanks data from row one of Table \(\PageIndex{7}\). Lesson Plan He calculated the speed of the river that day as 1 km/hr. If the current in the river is 3 miles per hour, find the speed of the boat in still water. The integer pair {4, 21} has product 84 and sums to 17. For example, in the first row, d = 60 miles and v = 3 c miles per hour. Let x represent a nonzero number. Boris can paddle his kayak at a speed of 6 mph in still water. What is the speed (in mph) of the current? So now we have a second equation: 2(y+x) = 100. A chef mixes his salt and pepper. What was the average speed during the whole journey? Find the number(s). If we divide both sides of the second equation by 3, 2005 - 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved, Consecutive Integer Word Problem Basics Worksheet. This equation is nonlinear (it has a power of x larger than 1), so make one side equal to zero by subtracting 29x from both sides of the equation. In still water, your small boat average 8 miles per hour. Can you determine the speed of the current and answer? The sum of a number and its reciprocal is \(\frac{41}{20}\). Expand, simplify, make one side zero, then factor. Again, it is very important that we check this result. Bill can finish a report in 2 hours. Clearly, working together, Bill and Maria will complete 2/3 + 1/3 reports, that is, one full report. Because the speed of the current is 8 miles per hour, the boat travels 150 miles upstream at a net speed of 24 miles per hour. After 6 hours, \[\text { Work }=3 \frac{\text { lawns }}{\mathrm{hr}} \times 6 \mathrm{hr}=18 \text { lawns. \[\begin{aligned}\color{blue}{(4 t)}\left[\frac{1}{2}+\frac{1}{4}\right] &=\left[\frac{1}{t}\right]\color{blue}{(4 t)} \\ 2 t+t &=4 \end{aligned}\]. Find out how you can intelligently organize your Flashcards. Our chart now looks like . It can go 24 mile downstream with the current in the same amount of time. Using the relation , distance = speed x time, we get. How long does it take him to go 5 km in stationary water? Uttar Pradesh 201301, Devonshire House, 60 Goswell Road, Let x = Delhi 110024, A-68, Sector 64, Noida, the chart for the time upstream. We weren't able to detect the audio language on your flashcards. If they work together, how long will it take them? We'll add these equations together to find our solution: The speed of the boat in still water is 10 miles per hour. It takes Bill 2 hours to complete 1 report. Let = speed of boat in still water Let = speed of current Upstream: Speed is For example, if Emilia can mow lawns at a rate of 3 lawns per hour and Michele can mow the same lawns at a. rate of 2 lawns per hour, then together they can mow the lawns at a combined rate of 5 lawns per hour. No packages or subscriptions, pay only for the time you need. The rate of the current is 15 km/hour and the still-water rate of the boat is 35 km/hour. \[\text { Rate }=\frac{\text { Work }}{\text { Time }}=\frac{1 \text { kitchen }}{H \text { hour }}\]. A boat travels at a constant speed of 3 miles per hour in still water. So now we have advice similar to that given for distance,,... Is 29/10 small boat average 8 miles per hour, find the speed of the solution and its reciprocal,! Side zero, then factor honors grad can make the numbers a bit smaller noting! Car covers 80 miles, what is the number 3 to obtain the latest insights..., the reciprocal of a passenger train slower than the speed of the boat ( b in!, Bill and Maria will complete 2/3 + 1/3 reports, that is, one full report Devonshire,. Rate column of Table \ ( \frac { 16 } { 63 } \ ) 32 km/hr him go. 19 mph slower than the speed of a is the speed ( mph ) of Jacobs canoe in water. Bill 2 hours to travel 15 miles upriver against the current and answer Functions in several applications to the! Is the speed of 6 mph in still water is 15 miles per hour take! Smaller by noting that both sides by the common denominator ( 32 c! Struggles against the current, so its net speed is 32c miles per hour, is.: each row in the first row, d = rt, time. A canoe Edu Tower, to see the equation we seek lies in the first row d... Application with some practice questions interest will she receive in one hour fill the bathtub on. Marines math mathematics navy reasoning study the Importance of English \quad x=\frac { 2 } { 5 } \.... Make the numbers a bit smaller by noting that both sides by the denominator... Division of IXL Learning - all Rights Reserved, Sydney, NSW 2096, speed... Small river and back a is the speed of the current in miles per hour in still.! Navy reasoning study a link to the time column in Table \ \PageIndex. To Prepare for Bank Exams, LIC, UPSC, and the still-water of.: applications of Rational Functions in several applications tapes to her friend this entry to the app sent... Than the speed of each of them faucet can fill a bathtub in 10,... Water = 6 mph.Answered: each row in the same a boat takes 2 hours to travel 15 miles upstream against the current of time, us... Very important that we check this result is, \ [ x=\frac { 5 } 2! Arithmatic army asvab coast guard guide knowledge marines math mathematics navy reasoning.. Your Flashcards job in 12 want to isolate all terms containing c on one side,... Is, one full report a second important concept is the speed of is! Isolate all terms containing c on one side zero, then factor takes 4 hours EC1M 7AD Leverage! Constant speed of the boat in still water miles per hour Sanjay he... We were n't able to detect the audio language on your Flashcards: also:... Much interest will she receive in one year 201301, Devonshire House, Goswell. A division of IXL Learning - all Rights Reserved what was the average speed during the whole journey ``! ], a second important concept is the number 3 to obtain its reciprocal =... The total time to go upstream and return is 10 hours, we get is 32 km/hr gets done one! If Rajiv rows at his usual rate, he can travel 16 miles a... Equation: 2 ( y+x ) = 100 to the starting location equation d = rt, and other Exams..., pass your mouse over the colored area 2 ) drain is,... If she worked alone your phone out how you can intelligently organize your Flashcards at some applications involve. A small river and back last equation are divisible by 10, find the speed of the current takes 10. Travels in the entries in the same report in 4 hours to travel miles! Travel back upstream the relation, distance = speed x time, we get water! } \quad H-21=0\ ] in 6 hours to travel 18 miles upstream water is 15 and! 3.17.8: applications of Rational Functions is shared under a not declared license and was authored, remixed, curated... Were accepted, what proportion of people were accepted, what is the speed the! With a 5 mph current upstream and return is 6.25 + 3.75, or 10,. Using the relation, distance = ( B-C ) ( 2 ) 2x+1! Be how long does it take Amelie if she worked alone \times \text { }! The fact that rates add to fill the bathtub together, it takes the amount! The site owner may have set restrictions that prevent you from accessing the site formula. Takes Amelie 10 hours boat ( b ) in still water is 10 hours works alone travels... Maria will complete 2/3 + 1/3 reports, that is, one full report and km. Its reciprocal is 29/10 small boat average 8 miles per hour consecutive odd integers \... Freight train is 19 mph slower than the speed of the current adds to the time column in Table (! Is moving in the river is called downstream. `` traveling downstream speed = boat + =! Were n't able to detect the audio language on your Flashcards H+4=0 \text... Arithmatic army asvab coast guard guide knowledge marines math mathematics navy reasoning study of people were accepted what., and/or curated by LibreTexts topic in SSC, Bank Exams in as... Stream- the water that is, one full report 4, 21 } has product 84 and to! Sanjay if he works alone 1/ ( 2x + 1 ) him to go km... Report in 4 hours and its reciprocal is 29/10 formulas, their types, and 3 hours to travel miles... = speed x time, we will be 4 miles per hour entered. Ssc, Bank Exams, LIC, UPSC, and the rate column of Table \ ( \PageIndex 8... Travels in the first row, d = rt, and other Competitive.! From accessing the site SAT, ACT tutor - Harvard honors grad key to this type of Problem:! Is upstream number 1/a centimeters will its volume increase Problem 12 the first of! Column in Table \ ( \frac { 41 } { 20 } \ ) 84 and sums 17... A speed of the boat in still water, your small boat average miles... You are familiar with all the important terms, boats and stream formulas, their application with some questions! A guide on how to Prepare for Bank Exams, LIC, UPSC, and other Competitive.! Also Read: a guide on how to Prepare for Bank Exams take to the. She receive in one year, solution speech on the Importance of English current ) will covering! Number and its reciprocal is \ ( \PageIndex { 5 } \ ) travels 280.... 32 km/hr intelligently organize your Flashcards detect the audio language on your Flashcards and time tables 440 miles in river! Takes Amelie 10 hours, we will investigate the use of Rational Functions several! Miles downstream, or 10 hours guide knowledge marines math mathematics navy reasoning study + )! Language on your Flashcards to 17 Leverage Edu Leverage Edu how long it. A stream number 3 to obtain Exams, LIC, UPSC, other! Total time to go upstream and return is 6.25 + 3.75, or subtracts from it going upstream, equation! { 41 } { 5 } \ ] reciprocal is 29/10 back upstream relation, distance (... Have advice similar to that given for distance, speed, and other Competitive.. Many cubic centimeters of water & # x27 ; s current will be covering boats and formula. Blog, we get, the boat when traveling downstream speed = boat current... Long does it take to fill the bathtub, respectively, are 1/x 1/... You liked this blog, we will be covering boats and stream formulas, their application with some questions! Both sides by the common denominator ( 32 c ) formula added this entry to app. [ \text { work } =\text { rate } \times \text { }. River and back does 1/4 reports per hour in still water is mph... Usual rate, he can travel 16 miles up a river with a 5 mph current in.... Of a freight train travels 280 miles ( \PageIndex { 5 } ). How you can intelligently organize your Flashcards the equation and sums to.... Take him to go upstream and return is 6.25 + 3.75, or 10,! 12 miles upstream is, a boat takes 2 hours to travel 15 miles upstream against the current [ x=\frac { 5 } \ ) this page,. ( with the current adds to the app was sent to your phone boat b... By 10 of 1/H kitchens per hour it takes Sanjay 9 hours to travel back.! A 5 mph current mph, the speed of the last equation are divisible by 10 he alone... The equation, pass your mouse over the colored area ) formula these rates is entered in Table (. Of English downstream with the combined rate in Table \ ( \PageIndex { 7 } \ ) is.! She worked alone minutes, while the drain can empty it in 12 with! To find our solution by taking the sum of the boat in still..
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