The size of the room below is 12'-9" by 11'-3" with an 8'-0" ceiling height. The total area of the door is 21 square feet and the total area of each window is 9 square feet. What is the total area of the wall surface ready for paint? Round o your answer to the closest unit.

I will calculate total area using inches:

total area = [(153 x 96) + (135 x 96)] x 2 = 55,296 in²

now we convert our answer to square feet = 55,296 / 144 = 384 ft²

I guess that there is only 1 door in the room, bu the number of windows is not clear:

30 people weigh 160 pounds or more