A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is :

A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is :

A 2.5km/ hr

B 4.2 km/ hr

C 5 km/ hr

D 10.5 km / hr

Solution

Correct Answer: Option A

B + C = 13

B - C = 8

2C = 5

=> c = 2.5kmph