SOLUTION: a boat travels 12 miles upstream and 12 miles back. the time required for the trip is 2 hours. the speed of the stream is 3 miles per hour. find the speed of the boat in still wate
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Question 347521: a boat travels 12 miles upstream and 12 miles back. the time required for the trip is 2 hours. the speed of the stream is 3 miles per hour. find the speed of the boat in still water?
Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
Upstream Trip:
rate = x + 3
time = 2
distance = 12
Downstream Trip:
rate = x - 3
time = 2
distance = 12
Let x = speed of boat in still water
2(x + 3) + 2(x - 3) = 12
2x + 6 + 2x - 6 = 12
4x = 12
x = 12/4
x = 3 miles per hour
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