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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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