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A boat travels 12 miles up a river, then returns to where it started. The trip upriver took one hour longer than the return trip. If the current is 3mph, find the speed of the boat
12 years ago

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Steve
distance/speed = time
if the boat's speed is s,

12/(s-3) = 1 + 12/(s+3)
s = 9
12 years ago

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