Task: Question Answering
Input (English): Problem: the cost of paint is 60 per kilograme. a kilogram paint covers 20 square feet. how much will it cost to paint the outside of a cube having each side 10 feet ?
Options: ['a. 3000', 'b. 900', 'c. 1800', 'd. 360', 'e. none of these']
Output (English): c