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

Let us say, distance = x

Upstream Speed = 5 – 1 => 4

Downstream Speed = 5 + 1 => 6

75 minutes in hours = 5/4 hours

As per the given question,

x/4 + x/6 = 5/4

5x/12 = 5/4

x = 3 KM

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