Planning & EstimatingQuestion 489 of 700
A rectangular room measures 12 ft by 15 ft with an 8 ft ceiling. Ignoring openings, what is the gross wall area to be painted?
a.180 square feet
b.216 square feet
c.360 square feet
d.432 square feet
Explanation
Gross wall area = perimeter x ceiling height. Perimeter = 2 x (12 + 15) = 2 x 27 = 54 ft. Wall area = 54 x 8 = 432 sq ft. Option a (180) is the floor area, not the walls. Option c (360) uses only two walls. For a takeoff you multiply the full perimeter by the height, then subtract door and window openings if the estimate must be precise.
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