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Q: Tap K can fill a tank in 8 hours and tap L can fill the same tank in 20 hours. In how many hours both tap K and L together can fill the same tank?
  • A. 20/3 hours
  • B. 60/11 hours
  • C. 18/5 hours
  • D. 40/7 hours
Correct Answer: Option D -
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Explanations:

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