Solve.A canoeist paddled 6 miles upstream in 6 hours and returned to his starting point downstream in 45 minutes. What was the speed of the current?
A. 3.5 mph
B. 5 mph
C. 4 mph
D. 4.5 mph
Answer: A
Mathematics
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F ? B ? D ? A ? E ? C
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A. 
B. 
C. - 
D. - 
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