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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.
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  • C.
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  • D. 6 minute
Correct Answer: Option C -
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Explanations:

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