Task: Question Answering
Input (English): Problem: hall is 15 m long and 12 m broad . if the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls , the volume of the hall is : 
Options: ['a ) 720', 'b ) 900', 'c ) 1200', 'd ) 1800', 'e ) 2100']
Output (English): c