A man can row 5 kmph in still water. If the the river is running at 1 kmph, it takes him 75 minutes to row to a place and back. How far is the place?

 

  • Option 1)

     

    3 km

     

  • Option 2)

     

    2.5 km

     

  • Option 3)

     

    2 km

     

  • Option 4)

     

    8.5 km

     

  • Option 5)

     

    4 km

     

Answers (1)

Let's assume distance = D

Upstream Speed = 5 - 1 => 4

Downstream Speed = 5 + 1 => 6

75 minutes in hours = 5/4 hours

According to question,

D/4 + D/6 = 5/4

5D/12 = 5/4

D = 3 KM

 

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