Task: Question Answering
Input (English): Problem: the area of a triangle is 615 m 2. if one of its sides is 123 metre, find the length of the perpendicular dropped on that side from opposite vertex.
Options: ['a. 15 metres', 'b. 12 metres', 'c. 10 metres', 'd. 9 metres', 'e. none of these']
Output (English): c