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Ajay can row his boat in still water, at a speed of 6 kmph.If the speed of the stream is 4 kmph, how long will he take to a distance of 30 km downstream?
1. 2 hours
2. 5 hours
3. 4 hours
4. 3 hours

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Correct Answer - Option 4 : 3 hours

Given:

Ajay can row his boat in still water at a speed of 6 km/hr. The speed of the stream is 4 km/hr.

Formula used:

Time = Distance/Speed

Calculation:

⇒ Speed of downstream = 6 + 4 = 10kmph

∴ Time is taken to a distance of 30 km downstream = 30/10 = 3 hours

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