If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to ﬁnish rest of the job?

If A, B and C can do a job working alone in 12, 18 and 36 days respect

1.	If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to ﬁnish rest of the job?
A.	9
B.	6
C.	3
D.	4
Answer» C. 3

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If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to ﬁnish rest of the job?

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