SOLUTION: A tank is fitted with a pipe that can fill it in three hours and a pipe that can empty it in six hours. If both pipes are open, how long will it take to fill the empty tank?

SOLUTION: A tank is fitted with a pipe that can fill it in three hours and a pipe that can empty it in six hours. If both pipes are open, how long will it take to fill the empty tank?

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Question 1129121: A tank is fitted with a pipe that can fill it in three hours and a pipe that can empty it in six hours. If both pipes are open, how long will it take to fill the empty tank?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!

6 hours to FILL, both pipes open
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