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  • A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days.
Question 1:
A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?
A. 18 days
B. 20 days
C. 24 days
Feedback 2c = ¼ + 1/6 – 1/3 = 1/12
c = 1/24 => 24 days
D. 30 days

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