SOLUTION: A river has a current of 5 miles per hour. If a boat can make a trip of 20 miles upstream and 30 miles downstream in 2 hours, find the rate of the boat in still water.

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Question 812439: A river has a current of 5 miles per hour. If a boat can make a trip of 20 miles upstream and 30 miles downstream in 2 hours, find the rate of the boat in still water.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a+b=2,
a*(x+5)=30,
b*(x-5)=20
a = 1, b = 1, boat in still water = 25
one hour each way