Correct Answer - Option 4 : 14
Given:
The upstream speed of a boat is 15 kmph and it travels a distance of 110 kms in 2 hours during downstream.
Formula:
Time taken by boat to travel upstream = D/(speed of bota in still water – speed of the stream)
Time taken by boat to travel downstream = D/(speed of bota in still water + speed of the stream)
Calculation:
The upstream speed of a boat is 15 kmph
Downstream speed = 110/2 = 55 kmph
Required time = 165/15 + 165/55 = 11 + 3 = 14 hours
