SOLUTION: a tugboat pushing a barge up the Ohio River takes 1 hour longer to travel 36 miles up the river than to travel the same distance down the river. If the rate of current is 3 mph, f

Question 38339: a tugboat pushing a barge up the Ohio River takes 1 hour longer to travel 36 miles up the river than to travel the same distance down the river. If the rate of current is 3 mph, find the speed of the tugboat and barge in still water
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
Letting x be the speed:
EQUATION:

36[(x+3)-(x-3)]=(x+3)(x-3)

x=15
Hence, the speed of the boat is 15mph.
Paul.
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