saifulcrc1397
18.02.2021 •
Mathematics
An inlet pipe on a swimming pool can be used to fill the pool in 47 hours. The drain pipe can be used 5o empty the pool in 48 hours. If the pool is 1/2 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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Ответ:
X=88
You multiply 4 by 22.