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Pipe A can fill a tank in 10 hours and pipe B in 15 hours. Because of a leak, the two together take 2 hours longer than usual. How long would the leak alone take to empty the full tank?

Competition practicePipes & Cisterns
  • A30 h
  • B24 h
  • C48 h
  • D8 h

Step-by-Step Solution

Usually → 6 h; now 8 h. Leak → 24 h. (8 h is the new filling time.)
Answer: B) 24 h

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