SOLUTION: Hello! I have this problem I am stuck on: A boat takes two hours to travel 20 miles up a river but only 1 hour and 20 minutes for the return trip find the rate of the boat in sti

Question 928687: Hello!
I have this problem I am stuck on:
A boat takes two hours to travel 20 miles up a river but only 1 hour and 20 minutes for the return trip find the rate of the boat in still water and the rate of the currents. Thanks!

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
r-c = 20mph
r + c = 15mph

2r = 35mph
r = 17.5
c = 2.5mph
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