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Q: Two pipes 'P' and 'Q' together can fill a tank in 4 hrs. When both the pipes are opened individually then Q takes 6 hours more as compared to P to fill the tank. P alone can fill the tank in how much time?
  • A. 5 hours
  • B. 6 hours
  • C. 8 hours
  • D. 7 hours
Correct Answer: Option B -
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Explanations:

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