SOLUTION: The speed of the current in a river is 5mi/hr. It takes 40 min. longer for a girl to paddle 1.2 miles upstream than the distance downstream. What'sher speed in still water?
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Question 98262: The speed of the current in a river is 5mi/hr. It takes 40 min. longer for a girl to paddle 1.2 miles upstream than the distance downstream. What'sher speed in still water? Answer by Nate(3500) (Show Source):
You can put this solution on YOUR website! Rate = x - 5
Time = 40/60 = 2/3
Rate * Time = Distance
(x - 5)(2/3) = 1.2
2x - 10 = 3.6
2x = 13.6
x = 6.8
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