Mathematics, 01.08.2021 08:50 lllmmmaaaooo
the inlet pipe of an oil tank can fill the tank in 1 hour 30 minutes. the outlet pipe can empty the tank in 1 hour. How long will it take to empty a full tank if both pipes open
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the inlet pipe of an oil tank can fill the tank in 1 hour 30 minutes. the outlet pipe can empty the...
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