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Time & Work
Time, Distance and Speed

If three workers can complete a job in 12 days, how many days will it take for 6 workers to complete the same job?

Answer: A. 6 days
If 3 workers take 12 days, then the total work is 3 * 12 = 36 worker-days. With 6 workers, they will take 36/6 = 6 days.
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