Aptitude - Pipes and Cisterns - Discussion

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Q.

Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled?. [Central Excise ]                         
A. 7hrs B. 7 hrs 30 mm
C. 8hrs D. 8 hrs. 30 mm

Answer: Option B
Explaination:

 


Discussion

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