BOATS and STREAMS Q64

64. 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?

A.        2.4 km          B.        2.5 km

C.        3 km  D.        3.6 km

Answer: Option A

Explanation:

Speed downstream = (5 + 1) kmph = 6 kmph.

Speed upstream = (5 - 1) kmph = 4 kmph.

Let the required distance be x km.

Then,	x	+	x	= 1
	6		4

 2x + 3x = 12

 5x = 12

                     x = 2.4 km.