Task: Question Answering
Input (English): Problem: a ship 77 km from the shore, springs a leak which admits to 9 / 4 tonnes of water in 11 / 2 minutes. 92 tonnes of water would sink it. but the pumps can throw out 12 tonnes of water per hour. find the average rate of sailing so that the ship may just reach the shore as it begins to sink.
Options: a. 10.5, b. 11, c. 12, d. 13, e. 15
Output (English): a