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Time & Work
Time, Distance and Speed

A can complete a work in 10 days, while B can complete the same work in 15 days. How many days will they take to complete the work together?

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