Task: Question Answering
Input (English): Problem: it takes avery 3 hours to build a brick wall while tom can do it in 4 hours. if the two start working together and after an hour avery leaves, how much time will it take tom to complete the wall on his own ?
Options: a. 25 minutes., b. 55 minutes., c. 1 hour and 41 minutes, d. 1 hour and 35 minutes, e. 1 hour and 20 minutes
Output (English): c