If A and B together can complete a work in 18 days, A and C together in 12 days and B and C together in 9 days, then in how many days B alone can do the work?
[A] 18 days
[B] 24 days
[C] 30 days
[D] 40 days

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This question is part of UPSC Prelims Practice and Mock Tests membership programme.

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