Answer:
The room is 13 feet wide.
Explanation:
Calculate for the Area of the room by dividing the cost by the price per square foot.
Area = $312 ÷ $2
Area = 156 ft²
Area of a rectangle = length x width
A = lw
Since we're given with 12 ft as the length then we can solve for the width 'w'
A = lw
Substitute
A = 156
l = 12
156 = 12w
Divide both sides of the equation by 12
156/12 = 12w/12
13 = w
w = 13ft