Aptitude - Pipes and Cisterns - Discussion

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Q.

Two pipes A and B can fill a cistern in 12 minutes and 16 minutes respectively. If both the pipes are opened together, then after how much time B should be closed so that the tank is full in 9 minutes?                         
A. 3 min and 30 sec. B. 4 min and 30 sec.
C. 4 min D. 4 min 77 sec.

Answer: Option C
Explaination:

 


Discussion

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