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Q: Pipes A and B can fill a tank in 15 hours and 12 hours respectively. Pipe C alone can empty the full tank in 10 hours . If all the three pipes are opened together for 2 hours 40 minuets then, what part of the tank will remain unfilled?
  • A.
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  • B.
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  • C.
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  • D.
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Correct Answer: Option B -
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Explanations:

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