A and B can do a piece of work in 45 and 40 days respectively. They start working together, but A leaves after some days, and B finishes the remaining work in 23 days. After how many days did A leave?
- A. 9 days
- B. 10 days
- C. 11 days
- D. 12 days
- 9 days
Please select one of the options to reveal the correct answer.