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The swimming pool in the figure has three identical inlets and two identical outlets. If all five are opened on the empty pool, how long will it take to fill?

Competition practicePipes & Cisterns
  • A9 h
  • B6 h
  • C3 h
  • D4 h

Step-by-Step Solution

Inlets: ; outlets: . Net per hour → 6 h. (3 h ignores the outlets.)
Answer: B) 6 h

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