SOLUTION: One pipe can fill a tank in 4 hours. A second pipe also requires 4 hours but a third needs three hours. How long will it take to fill the tank if all three pipes are open?
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Question 739591: One pipe can fill a tank in 4 hours. A second pipe also requires 4 hours but a third needs three hours. How long will it take to fill the tank if all three pipes are open? Answer by richwmiller(17219) (Show Source):
