SOLUTION: A man can row downstream 18 km at the same time that he can row 10 km upstream. What is the rate of the current if he can row 4 kilometers per hour in still water?

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Question 352610: A man can row downstream 18 km at the same time that he can row 10 km upstream. What is the rate of the current if he can row 4 kilometers per hour in still water?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
18 / (4 + c) = 10 / (4 - c)