A ,motorboat can travel 30 km upstream and 28 km downstream in 7 h. It can travel 21 km upstream
Channel: Doubtnut
Date: 2020-01-19

A ,motorboat can travel 30 km upstream and 28 km downstream in 7 h. It can travel 21 km upstream and return in 5 h. Find the speed of the boat in still water and the speed of the stream.