Mathematics, 13.10.2020 04:01 johngayden46
A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 14 days and the other pipe can fill it in 21 days. However, if no sewage is added, waste removal will empty the pool in 39 days. How long will it take the two inlet pipes to fill an empty pool?
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A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 14 days and the other pipe...
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