teetee9630 teetee9630

29-09-2022
Mathematics

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An inlet pipe on a swimming pool can be used to fill the pool in 21 hours. the drain pipe can be used to empty the pool in 28 hours. if the pool is 14 filled and then the inlet pipe and drain pipe are opened, how many more hours would it take to fill the pool? round your answer to two decimal places, if needed.

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