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Q: Two pipes A and B fill a tank in 15 and 30 minutes respectively. A third pipe C empties it in 20 minutes. If all the three pipes are opened simultaneously, then the time taken to fill the tank will be
  • A. 45 minutes/45 मिनट
  • B. 35 minutes/35 मिनट
  • C. 20 minutes/20 मिनट
  • D. 10 minutes/10 मिनट
Correct Answer: Option C -
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Explanations:

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