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Mathematics, 22.01.2021 16:20 hntnhtthnyt

An inlet pipe on a swimming pool can be used to fill the pool in 18 hours. The drain pipe can be used to empty the pool in 30 hours. If the pool is filled and then the inlet pipe
and drain pipe are opened, how long from that time will it take to fill the pool?

Please show steps 20 points!!!

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An inlet pipe on a swimming pool can be used to fill the pool in 18 hours. The drain pipe can be us...
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