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The tank in the figure is one-quarter full. How long will the inlet take to fill it completely?

Competition practicePipes & Cisterns
  • A12 h
  • B16 h
  • C9 h
  • D3 h

Step-by-Step Solution

Three-quarters remain: h. (3 h is the time for the quarter already there.)
Answer: C) 9 h

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