Question

a motorboat travels 25.0 km/h in still water. what will be the magnitude and direction of the velocity of the boat if it is directed upstream on a river that flows at the rate of 4.00 km/h?

Answer 1

Since it is going upstream, subtract the river flow velocity.

Answer 2

A river flows at a uniform speed of 2ms-1 and is 100m wide. A motor boat
has a maximum speed in still water of 7ms-1