SOLUTION: Suppose your friend can row 10 mph downstream and 6mph upstream. What is the rate of the current?

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Question 554572: Suppose your friend can row 10 mph downstream and 6mph upstream. What is the rate of the current?
Answer by Alan3354(69443) About Me  (Show Source):
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Suppose your friend can row 10 mph downstream and 6mph upstream. What is the rate of the current?
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His rowing speed is the average, (10 + 6)/2 = 8 mi/hr
The current speed is the difference, 10 - 8 = 2 mi/hr