A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

2.4

2.5

3

3.6

Speed downstream = (5 + 1) kmph = 6 kmph. Speed upstream = (5 - 1) kmph = 4 kmph. Let the required distance be x km. Then, x/6 + x/4 = 1 => 2x + 3x = 12 => 5x = 12 => x = 2.4 km.

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