SOLUTION: A swimming pool holds 600,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in 120 minutes, and the second p

SOLUTION: A swimming pool holds 600,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in 120 minutes, and the second p

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Question 817222: A swimming pool holds 600,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in 120 minutes, and the second pipe alone can empty it in 200 minutes. When both pipes are draining together, how long does it take them to empty the pool?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/120+1/200=1/x
x = 75 minutes

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