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@? Aptitude ? Boats and Streams ? Important Formulas / Rule / Type 1
Boats and streams -> important facts and formulae. I. In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream. II. If the speed of a boat in still water is u km/ht and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr Speed upstream (u - v) km/hr. III. If the speed downstream is a km/hr and the speed upstream is b km/hr, then: Speed in strill water = 1/2 (a + b) km/hr Rate of stream = 1/2 (a - b) km/hr. Boats and streams -> solved examples. 1. In a stream running at 2 kmph, a motorboat goes 6 km up. Derivation of formula 8 (boats and streams). Let the speed of a man in still water = $x$ km/hr speed of the stream = $y$ km/hr. Assume he travels a distance $d$ km upstream and come back the same distance downstream, and total time taken = $t$ hours. Speed downstream $=(x+y)$ Speed upstream $=(x-y)$. Time taken to travel upstream $=\dfrac{d}{x-y}$ Time taken to travel downstream $=\dfrac{d}{x+y}$. Total time $=t$ $\dfrac{d}{x-y}+\dfrac{d}{x+y}=t\\ d(x+y)+d(x-y)=t(x+y)(x-y)\\ 2dx=t(x+y)(x-y)\\ 2dx=t(x^2-y^2)\\ d=\dfrac{t(x^2-y^2). }{2x}$. This is the aptitude questions and answers section on "Boats and Streams Important Formulas" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.� Downstream/Upstream: In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream. If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr. Speed upstream = (u - v) km/hr.

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Well, this post will surely help you with that. And after checking all this, you can even take the Test. Actually, an individual can expect these kinds of Questions in both Aptitude and Quantitative sections. So, prepare well. Knowing Shortcuts and Tricks will help you a lot in solving these kinds of Questions.

Therefore, check them. And get an idea. Then eventually, try on some problems. Then you can go ahead and take the Test. Well, the Quiz we are providing on this page is for free. Yes, you heard it right. So, what are waiting for? Go ahead and take the Test. Now, in this section, we are going to provide information about the common terminology that will be used in the Question. Well, by memorizing and practicing, you will have an outline on how to solve the problems. Therefore, please check them.

And then try to take the Quiz we gave on this page. Surely, you can top it. For more such helpful Updates and Quizzes, check our site Freshersnow. Share on Facebook. A man can row upstream 10 kmph and downstream 20 kmph. Find the man rate in still water and rate of the stream.

The man's speed against the current is:. A man takes 20 minutes to row 12 km upstream which is a third more than the time he takes on his way downstream. What is his speed in still water? In one hour, a boat goes 11km along the stream and 5 km against it. Find the speed of the boat in still water. A boat runs at 22 km per hour along the stream and 10 km per hour against the stream.

Find the ratio of the speed of the boat in still water to that Boats And Streams Aptitude Formulas Outlet of the speed of the stream. In one hour, a boat goes 11 kmph along the stream and 5 kmph against the stream. The speed of the boat in still water in kmph is :. A boat sails 15 km of a river towards upstream in 5 hours. How long will it take to cover the same distance downstream, if the speed of the current is one-fourth the speed of the boat in still water:. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.

A man rows to a place at a distance of km and comes back to the starting point. The total time taken by him is:. Page 3 of 5 Find his speed in still water. The distance travelled downstream in 24 minutes is:. A man can row upstream at 7 kmph and downstream at 10 kmph. Discover man's rate in still water and the rate of the momentum.

The speed of the boat upstream is? Page 4 of 5 A man can row upstream at 8 kmph and downstream at 13 kmph.

The speed of the stream is:. If Rahul rows 15 km upstream in 3 hours and 21 km downstream in 3 hours, then the speed of the stream is. Page 5 of 5 A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water? A boat covers a certain distance downstream in 1 hour, while it comes back in 1. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?

A motor boat takes 12 hours to go downstream and it takes 24 hours to return the same distance. A boat takes 19 h for travelling downstream from point A to point B and coming back to point C, midway between A and B. What is the distance between A and B? A boat takes 12 hours to cover 64 km downstream and 8 hours to cover 32 km upstream. Then the speed of the boat in still water is:. Tech BE B. Com BCA. Tech ME M. Sc MCA M. Govt Jobs by Qualification.

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