The cost to paint the walls and the ceiling is $855
How much will it cost?
First, we need to find the area that will be painted.
The area of two of the walls is:
A = 20ft*12ft = 240ft²
The area of the other two walls:
A' = 30ft*12ft = 360ft²
The area of the ceiling is:
A'' = 20ft*30ft = 600ft²
We also need to subtract the areas of the two doors and the 4 windows.
Each door is 7ft by 3ft, so the area of each door is:
a = 7ft*3ft = 21ft²
Each window is 4ft by 3ft:
a' = 4ft*3ft = 12ft²
Then the total area that will be painted is:
area = 2A + 2A' + A - 2a - 4a'
area = 2*( 240ft²) + 2*(360ft²) + 600ft² - 2*(21ft²) - 4*(12ft²)
area = 1,710 ft²
We know that we need two coats of paint to cover that area, and the cost per square foot of paint is $0.25, then the total cost is:
C = $0.25*2*(1,710) = $855
The cost to paint the walls and the ceiling is $855
If you want to learn more about areas:
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