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  •  A man which has a speed of 5km/h in still water crosses a river of width 1km along the shortest possible path in 15 minutes. The velocity of river wa

 A man which has a speed of 5km/h in still water crosses a river of width 1km along the shortest possible path in 15 minutes. The velocity of river water in km/h is :


 

Option: 1

3


Option: 2

4


Option: 3

8


Option: 4

10

 

       


Answers (1)

best_answer

 

\cos \theta = \frac{4}{5}

\sin \theta = \frac{3}{5}

Now V_{R}= 5\times \frac{3}{5}=3\: Km /h

Posted by

Deependra Verma

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