To find the surface area that needs to be painted, we need to calculate the area of all of the walls, the floor, and the ceiling separately, and then add them together.
First, let's find the area of the walls:
- two walls are 20ft long and 9ft high, so the area of each wall is 20ft x 9ft = 180 square feet. Since there are two walls like this, the total area for these two walls is 180 sq ft x 2 = 360 square feet.
- the other two walls are 15ft wide and 9ft high, so the area of each wall is 15ft x 9ft = 135 square feet. Since there are two walls like this, the total area for these two walls is 135 sq ft x 2 = 270 square feet.
Adding the areas of all four walls gives us 360 sq ft + 270 sq ft = 630 square feet for the walls.
Next, let's find the area of the floor and ceiling:
- the area of the floor is 20ft x 15ft = 300 square feet.
- the area of the ceiling is also 20ft x 15ft = 300 square feet.
Adding the areas of the floor and ceiling gives us 300 sq ft + 300 sq ft = 600 square feet.
Now, we can add the areas of all the walls, the floor, and the ceiling:
630 sq ft (walls) + 600 sq ft (floor and ceiling) = 1230 square feet.
So, the total surface area that needs to be painted, including the floor and ceiling, is 1230 square feet.
For Monica s 14 th birthday she wants to make over her bedroom the first phase in the bedroom makeover is painting her room if Monica s room is 20ft long 15ftwide and 9 ft high find the surface area of the room that you are going to paint including the floor and ceiling
1 answer