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A garden hose fills a fish pond in 11 hours and a second hose fills it in 44 hours. With both running, how many hours does the pond take to fill?

Competition practiceTime & Work / Pipes
  • A8.8
  • B27.5
  • C9
  • D10

Step-by-Step Solution

Combined rate = 1/11 + 1/44 = 4/44 + 1/44 = 5/44 of the pond per hour, so 44/5 = 8.8 hours.
Answer: A) 8.8

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