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The floor or ceiling of a rectangular 11' by 12' room.
The area of the floor is 48 square feet, and the area of the ceiling is the same. In order to calculate the area of the walls, we have to know the height of the ceiling above the floor.
Floor . . . 18.7 x 11 = 205.7 square feet Ceiling . . . same as floor Walls . . . need the height of the room in order to calculate these
The area of the floor or ceiling is 81 square feet.That's all you need if you're getting ready to paint the floor or ceiling. We can't tell anything about the area of the walls until we know the height of the room too.
The area of the floor is 414 square feet.The area of the ceiling is 414 square feet.If we knew the floor-to-ceiling height, we could alsocalculate the area of the walls.