Quantitative Aptitude :: Pipes & Cistern - Discussion
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Choose the correct option.
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 is:
A60 gallons
B100 gallons
C120 gallons
D180 gallons
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