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Time & Work
Time, Distance and Speed

If C can do a piece of work in 24 days and D can do it in 16 days, how long will it take for them to complete the work together?

Answer: A. 9.6 days
The combined work rate of C and D is 1/24 + 1/16 = 5/48. Therefore, they will complete the work in 48/5 = 9.6 days.
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