SOLUTION: A swimmer can swim at twice the speed of the prevailing tide. If it takes her 4 minutes to swim round trip to a buoy, how long will it take her to swim the identical trip in still

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Question 274687: A swimmer can swim at twice the speed of the prevailing tide. If it takes her 4 minutes to swim round trip to a buoy, how long will it take her to swim the identical trip in still water?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
d = distance to buoy ___ 2p = swim rate

(d / p) + (d / (3p)) = 4

(3d / 3p) + (d / (3p)) = 4

(4d) / (3p) = 4

(2d) / (3p) = 2

(2d) / (2p) = 3