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Q: Pipes A, B and C can fill a tank in 15, 30 and 40 hours, respectively. Pipes A, B and C are opened at 6 a.m., 8 a.m. and 10 a.m., respectively, on the same day. When will the tank be full?
  • A. 7:20 p.m.
  • B. 3:20 p.m.
  • C. 5:20 p.m.
  • D. 11:20 p.m.
Correct Answer: Option B -
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Explanations:

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