Q.4) A and B can do a piece of work in 15 days. B and C can do the same work in 30 days. A and C need 18 days to complete the work. In how many days will Calone complete the work?
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Answer:
1/120
Step-by-step explanation:
A+B+C) can do a piece of work in = 15 days
(A+B+C)’s 1 day work =
15/1
B alone can do a piece of work in = 30 days
B’s 1 day work = 1/30
C alone can do a piece of work in = 40 days
C’s 1 day work = 1/40
So,
A’s 1 day work = 15/1 - 1/30 + 1/40
1/120
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