A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days, then in how many days can they ﬁnish the rest of the job, while B alone can do the job in 15 days?

A is thrice as productive as C. Together they can complete a job in 22

1.	A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days, then in how many days can they ﬁnish the rest of the job, while B alone can do the job in 15 days?
A.	6
B.	3
C.	9
D.	2
Answer» C. 9

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A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days, then in how many days can they ﬁnish the rest of the job, while B alone can do the job in 15 days?

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