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A can finish a piece of work in 10 days, B in 15 days. How long will they take together?
A8 days
B5 days
C6 days
D7.5 days
Answer & Solution
Correct answer: C. 6 days
Combined rate = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6. Time together = 6 days.
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