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Mathematics, 26.03.2020 22:22 dm0321545
A swimming pool holds 585,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in 135 minutes, and the second pipe alone can empty it in 195 minutes. When both pipes are draining together, how long does it take them to empty the pool?
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A swimming pool holds 585,000 liters of water. The pool has two drainage pipes. When the pool is com...
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