Q. A, B and C can complete a task together in 10 days. A and B would need 12 days if only the two of them worked, while B and C would take 20 days if only the two of them worked. If B worked alone, how many days would she take to complete the task?

A) 22

B) 30

C) 20

D) 45

✔ Correct Answer: 30

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