Q. A and B together can complete a task in 12 days. However, if A works alone, completes half the job and leaves and then B works alone and competes the rest of the work, it takes 25 days in all to complete the work. If B is more efficient than A, how many days would it have taken B to do the work by herself?
A) 22
B) 18
C) 15
D) 20
✔ Correct Answer: 20
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