SOLUTION: A man rowed ten miles downstream in one hour and 15 mins. The return trip took four hours. What is the rate of the current?

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Question 910407: A man rowed ten miles downstream in one hour and 15 mins. The return trip took four hours. What is the rate of the current?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Re TY
Note: one hour and 15 mins is 1 1/4hr or (5/4) hr
r+c = 8 mph 10mi%2F%285%2F4%29hr
r-c = 5/2 10mi%2F%284hr%29%29
2r = 21/2
r = 21/4 mph 0r 5 1/4 mph
c = 11/4 mph 0r 2 3/4 mph