Question

A man wishes to cross a river perpendicularly. In still water he takes 4 minutes to cross the river, but in flowing river he takes 5 minutes. If the river is 100 meters wide, the velocity of the flowing water of the river is​

Answer 1

Answer:

So his speed (in still water) is 100 / 4 = ?? meters/minute

His path speed is the same, but it takes him an extra minute to get across, to the path length is 5/4 longer across the water’s surface