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Q:

A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?

  • 1
    4 hrs
  • 2
    4 hrs15 min
  • 3
    3 hrs 15 min
  • 4
    3 hrs 45 min
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Answer : 4. "3 hrs 45 min"

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