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Question 1:
A and B together can do a piece of work in 8 days. If A alone can do the same work in 12 days, then B alone can do the same work in?
A. 20 days
B. 16 days
C. 24 days
Feedback B = 1/8 – 1/12 = 1/24 => 24 days
D. 28 days

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