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P is 50% more efficient than Q. Together they complete a task in 18 days. How many days would P alone take?

Competition practiceTime & Work / Pipes
  • A30
  • B45
  • C27
  • D36

Step-by-Step Solution

Let Q do 2 units/day; P does 3. Task = units. P alone: 90/3 = 30 days.
Answer: A) 30

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