Mathematics, 30.04.2021 19:20, moneymaleia9264

Working alone, Darryl can mop a warehouse in 11 hours. Elisa can mop the same warehouse in 9 hours. If they worked together how long would it take them?

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Working alone, Darryl can mop a warehouse in 11 hours. Elisa can mop the same warehouse in 9 hours...