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Q: A pump can fill a tank in 4 hours, but due to a leakage, the tank now gets filled in 5 hours. How long will it take the leakage to empty the tank when it is full?
  • A. 20 hours
  • B. 9 hours
  • C. 1 hour
  • D. 4.5 hours
Correct Answer: Option A -
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Explanations:

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