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A tank has an inlet that fills it in 8 hours. When the tank was one-quarter full, a leak started, and the tank took 3 hours more than usual to fill. How long would the leak alone take to empty the full tank?

Competition practicePipes & Cisterns
  • A24 h
  • B12 h
  • C11 h
  • D72 h

Step-by-Step Solution

Usual 8 h; first took 2 h, so the remaining took h → net . Leak → 24 h.
Answer: A) 24 h

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