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The upstream speed of a boat is 15 kmph and it travels a distance of 110 kms in 2 hours during downstream. Find the time taken by the boat to travel 165 kms upstream and 165 kms downstream.
1. 16
2. 15
3. 12
4. 14

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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

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