A man can row 9\frac{1}{3}  kmph in still water and he finds that it takes him thrice as much time to row up than as to row down the same distance in river. The speed of the current is?

 

  • Option 1)

     

    5 kmph

     

  • Option 2)

     

    4\frac{2}{3}kmph

     

  • Option 3)

     

    4\frac{2}{5}\:kmph

     

  • Option 4)

     

    4\frac{1}{4}kmph

     

  • Option 5)

     

    5\frac{1}{4}kmph

     

Answers (1)

Man's Speed = 9(1/3) kmph or 28/3 kmph

Let's Assume the speed of current = x

Upstream Time: Downstream Time = 3: 1

Upstream Speed: Downstream Speed = 1: 3

According to Question,

\frac{\frac{28}{3}+x}{\frac{28}{3}-x} = \frac{3}{1}

x = 14/3 Kmph

 

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