Mathematics, 01.12.2021 02:00, xchainq
One inlet pipe can fill an empty pool in 8 hours, and a drain can empty the pool in 20 hours. How long will it take the pipe to fill the pool if the drain is left open?
Answers: 2
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One inlet pipe can fill an empty pool in 8 hours, and a drain can empty the pool in 20 hours. How lo...
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