Mathematics, 14.12.2019 06:31, hazeleyes8908

An inlet pipe can fill a tank in 10 hours. an outlet pipe can drain that sametank in 30 hours. the inlet valve is opened, but the outlet valve is accidentallyleft open. how long will it take to fill the tank with both valves open?

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An inlet pipe can fill a tank in 10 hours. an outlet pipe can drain that sametank in 30 hours. the i...