Mickey only paints the walls and the ceiling of the room. Therefore, the surface area he will cover is 1850 ft².
How to calculate surface area
The room is a rectangular prism.
Surface area of a rectangular prism = 2(wl + hl + hw)
where
- l = length = 30 ft
- w = width = 25 ft
- h = height = 10 ft
He only paint the walls and the ceiling . Recall the walls have 4 surface and the ceiling only have a single surface.
Therefore,
Surface area of the walls = 2(hl) + 2(hw) = 2(10(30)) + 2(10(25)) = 600 + 500 = 1100 ft²
Surface area of the celling = lw = 30 × 25 = 750 ft²
Surface area needed to be covered = 750 + 1100 = 1850 ft²
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