Aptitude - Pipes and Cisterns - Discussion

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Q.

A cistern can be filled by pipe A and B in 12 minutes and 10 minutes respectively. The full tank can be emptied by a third pipe C in 8 minutes only. If all the taps be turned on at the same time, the cistern will be full in how much time?                         
A. 17(1/7) Min B. 18(1/7) Min
C. 12(1/7) Min D. 14(1/7) Min

Answer: Option A
Explaination:

 


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