You need to paint the side walls of your bedroom. If

the room is 12 feet by 14 feet, and it has a ceiling
10 feet high. What is the area you need to paint?

1 answer

To calculate the area of the side walls that need to be painted in a room, you first need to determine the total perimeter of the room's walls and then multiply by the height of the walls.

  1. Calculate the perimeter of the room:

    • The room has two pairs of walls: two walls that are 12 feet long and two walls that are 14 feet long.
    • Perimeter (P) = 2(length + width)

    \[ P = 2(12 \text{ ft} + 14 \text{ ft}) = 2(26 \text{ ft}) = 52 \text{ ft} \]

  2. Calculate the area of the walls:

    • The height of the ceiling is 10 feet.
    • The area (A) of the walls is given by multiplying the perimeter by the height of the room:

    \[ A = \text{Perimeter} \times \text{Height} = 52 \text{ ft} \times 10 \text{ ft} = 520 \text{ ft}^2 \]

Therefore, the area you need to paint is 520 square feet.