Q. A and B can together do a work in 6 days. A can do it alone in 9 days. In how many days can B do it alone?
A) 21 days
B) 24 days
C) 18 days
D) 14 days
✔ Correct Answer: 18 days
Exam Insight
The work rate of A and B together is 1/6, and A's rate is 1/9. B's rate is (1/6 - 1/9) = 1/18. Therefore, B can complete the work alone in 18 days.