Two pipes can fill a tank in 20 minutes and 24 minutes respectively an – McqOptions

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1.	Two pipes can fill a tank in 20 minutes and 24 minutes respectively and a drawn pipe can empty the tank at the rate of 3 gallons per minute, all three pipes working together fill the empty tank in 15 minutes, How much is the capacitance?
A.	12 gallons
B.	78 gallons
C.	120 gallons
D.	89 gallons
Answer» D. 89 gallons

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