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Q: When operated separately, pipe A takes 5 hours less than pipe B to fill a cistern, and when operated together, the cistern gets filled in 6 hours. In how much time (in hours) will pipe A fill the cistern, if operated separately?
  • A. 15 hours
  • B. 9 hours
  • C. 18 hours
  • D. 10 hours
Correct Answer: Option D -
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Explanations:

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