A man can row a boat at 10 km/hr in still water. If the speed of the stream is 6 km/hr, the time taken to row a distance of 80 km downstream is:

A man can row a boat at 10 km/hr in still water. If the speed of the stream is 6 km/hr, the time taken to row a distance of 80 km downstream is: Correct Answer 20 hours

Relative downstream speed = 10 + 6 = 16 km/hr So, time needed = distance / speed = 80 / 16 =  5 hours.
Bissoy MCQ

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