A riverboat travels with a velocity of 4.60 m/s from one shore to another. The velocity of the river is 2.30 m/s. If the width of the river is 72.0 m, how far does the boat travel downstream to reach the other shore?

Answer 1

you can make this hard (or more general) by setting up distance/speed calculations, and all that, but just notice that

the river's speed is 1/2 that of the boat.

So, the boat goes downstream 1/2 as far as it goes across.