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Q: Three taps A, B and C can fill a tank in 50, 60 and 75 hours respectively. How long (in hours) would the three taps take to the tank if all of them are opened together?
  • A. 12 hours
  • B. 15 hours
  • C. 20 hours
  • D. 10 hours
Correct Answer: Option C -
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Explanations:

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