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Time & Work
Time, Distance and Speed

A can do a work in 15 days, B can do it in 10 days, and C can do it in 6 days. If they all work together, how long will it take to complete the work?

Answer: B. 3 days
The combined work rate is 1/15 + 1/10 + 1/6 = 1/3. Therefore, they can complete the work together in 3 days.
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