Quantitative Aptitude :: Boats and Streams - Discussion

Show Explanation

Please attempt the question to view the Explanation !!!

Explanation:
river speed = 6 kmph
man can row in still water by speed = 1.2 kmph
man can row in downstream by speed = (6 + 1.2) kmph = 7.2 kmph
man can row in upstream by speed = (6 - 1.2) kmph = 4.8 kmph
Let's assume place distance form starting point = x km
So time taked for up and down = x/7.2 + x/4.8 = 1
=> x = 2.88 km