SOLUTION: A man can row a boat 4 miles per hour in still water. If he can row downstream three times as fast as he can row upstream, find the rate of the current.

Question 768528: A man can row a boat 4 miles per hour in still water. If he can row downstream three times as fast as he can row upstream, find the rate of the current.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A man can row a boat 4 miles per hour in still water. If he can row downstream three times as fast as he can row upstream, find the rate of the current.
let speed of current = y
Upstream speed = (4-y)
Down stream speed = (4+y)
(4+y) = 3(4-y)
4+y = 12-3y
4y=12-4
4y=8
y=2
speed of current = 2 mph
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