Mathematics, 31.07.2019 19:10 mauri66
An inlet pipe on a swimming pool can be used to fill the pool in 40 hours. the drain pipe can be used to empty the pool in 42 hours. if the pool is 23 filled and then the inlet pipe and drain pipe are opened, how long from that time will it take to fill the pool?
Answers: 1
pool is filled 
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An inlet pipe on a swimming pool can be used to fill the pool in 40 hours. the drain pipe can be use...
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