Task: Question Answering
Input (English): Problem: 3 pumps, working 8 hours a day, can empty a tank in 2 days. how many hours a day must 15 pumps work to empty the tank in 1 day ?
Options: a. 3.5, b. 4.8, c. 5.1, d. 5.2, e. 6.3
Output (English): a