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Q. A tank can be filled with water by two pipes A and B together in 36 minutes. If the pipe B was stopped after 30 minutes, the tank is filled in 40 minutes. The pipe B can alone fill the tank in:

  • (A) 45 minutes
  • (B) 60 minutes
  • (C) 75 minutes
  • (D) 90 minutes
  • Correct Answer - Option(D)
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