A river is 2 km wide and flows at 6 km/h. A motor boat that has a speed of

20 km/h in still water heads out from one bank perpendicular to the current.

A marina lies directly across the river on the opposite bank. Use Geometric

Vectors to solve this problem.

a. How far downstream from the marina will the boat reach the other bank?

b. How long will it take?

Im realy not sure about how to do this...