A man can row a boat at 20 kmph in still water.

A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 72 km downstream?

Quiz

Answer/Solution

36/14 hours

Steps/Work

Speed downstream = 20 + 6 = 26 kmph.
Time required to cover 72 km downstream = d/s = 72/26
= 36/13 hours.
Answer:E