Aptitude - Pipes and Cisterns - Discussion

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Q.

A cistern can be filled by pipe A and B in 40 minutes and 60 minutes respectively. There is also an outlet C. If all the taps are open together the tank is full in 1 hour and 15 minutes. How much time is taken by C to empty the full tank?                         
A. 23 (13/19) Min B. 22 (13/19) Min
C. 24 (13/19) Min D. 25 (13/19) Min

Answer: Option A
Explaination:

 


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