Aptitude - Pipes and Cisterns - Discussion

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Q.

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:                         
A. 60 gallons B. 100 gallons
C. 120 gallons D. 180 gallons

Answer: Option C
Explaination:

 


Discussion

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