The floor area is found by multiplying the length and width: 20ft x 15ft = 300ft²
The ceiling area is also 300ft².
To find the wall area, we need to find the perimeter of the room and multiply by the height. Perimeter = 2(20ft + 15ft) = 70ft. Wall area = 70ft x 9ft = 630ft².
To find the total surface area that needs to be painted, we add the floor area, ceiling area, and wall area.
Total surface area = floor area + ceiling area + wall area
Total surface area = 300ft² + 300ft² + 630ft²
Total surface area = <<300+300+630=1230>>1230ft²
Therefore, the surface area that needs to be painted, including the floor and ceiling, is 1230ft².
Monica's room is 20ft long, 15ft wide, and 9ft high, find the surface area of the room that you are going to paint including the floor and ceiling
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