Ravi can row a boat in still water at the speed of 14 km/h. If a river is flowing at the speed of 2 km/h and Ravi takes 3 hours to cover a certain distance upstream, then how much time will he take to cover the same distance downstream?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 2 h 15 m.
Effective speed during upwards journey = (14 - 2) kmph = 12 kmph
And Distance covered = 12 × 3 = 36 km
Effective speed during downwards journey = (14 + 2) kmph = 16 kmph
So, Time taken by Ravi to cover 36 km downstream
= 36 ÷ 16 = 2.25 hours = 2 hours 15 minutes