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Q: One inlet pipe can fill the tank in 2 hours and outlet pipe can empty a tank in 3 hours. if the inlet and outlet pipe are opened together at the same time, then in how many hours an empty tank is filled?
  • A. 2 h
  • B.
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  • C. 3 h
  • D. 6 h
Correct Answer: Option D -
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Explanations:

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