Q: Pipes A and B can fill a tank in 18 minutes and 22½ minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in _____.
A.
5 minute
B.
C.
D.
6 minute
Correct Answer:
Option C -
Explanations:
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