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m men can do a job in d days. After d/2 days, half of the men leave. How many days does the job take in all?

Competition practiceTime & Work / Pipes
  • A3d/2
  • B2d
  • Cd
  • D5d/4

Step-by-Step Solution

Half the job is left for half the men: that takes d more days after the first d/2.
Answer: A) 3d/2

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