a 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 :
answer : c ) 1200
volume_rectangular_prism(15, 12, divide(multiply(const_2, rectangle_area(12, 15)), add(multiply(12, const_2), multiply(15, const_2))))