Task: Question Answering
Input (English): Problem: 15 men can complete a work in 10 days while 20 boys can complete the same work in 15 days. how many days will 10 men and 10 boys together take to complete the same work
Options: a. 9 days, b. 10 days, c. 11 days, d. 12 days, e. 13 days
Output (English): b