distance down stream problem

Question

Mias motorboat took 3 hr to make a trip downstream with a 6-mph current. The return trip against the same current took 5 hr. find the speed of the boat in still water.

Answer 1

Alright, Skylar, d = rt, right? Since the distance was the same both directions, we take into account the current.

 

(r + 6)3 = (r - 6)5

 

I bet you can solve for r from here for your answer!