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

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1.	Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank in gallons is ?
A.	100
B.	110
C.	120
D.	140
Answer» D. 140

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