Mathematics, 22.06.2021 23:40 Echo009
An inlet pipe on a swimming pool can be used to fill the pool in 29 hours. The drain pipe can be used to empty the pool in 30 hours. If the pool is 15 filled and then the inlet pipe and drain pipe are opened, how long from that time will it take to fill the pool?
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An inlet pipe on a swimming pool can be used to fill the pool in 29 hours. The drain pipe can be use...
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