Task: Question Answering
Input (English): Problem: johnson completes a piece of work in 10 days, vincent completes the same work in 40 days. if both of them work together, then the number of days required to complete the work is
Options: a. 7 days, b. 8 days, c. 9 days, d. 10 days, e. 12 days
Output (English): b