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Q: Tank has two taps. Tap A is to fill the tank and tap B is to empty the tank. If only tap A can fill the tank in 35 hours, then only tap B can empty the full tank in 70 hours. Find the time taken to fill the half filled tank?
  • A. 35 hours
  • B. 40 hours
  • C. 70 hours
  • D. 55 hours
Correct Answer: Option A -
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Explanations:

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