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Q: An inlet pipe can fill a tank in 4h and an outlet pipe can empty the tank in 6h. By mistake, both the pipe are kept open. Find the number of hours in which the tank will be half-full.
  • A. 12 h
  • B. 10 h
  • C. 6 h
  • D. 8 h
Correct Answer: Option C -
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Explanations:

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