You are painting the walls and ceiling of a rectangular 20 x 30 ft room. The walls are 10 feet tall. You need two coats of paint. If a gallon of paint covers 400 square feet and cost $53 per gallon, how much will you spend on painting this room?
Total square footage to be painted =
Ceiling = 20 * 30 = 600 sq ft
Walls 10 ( 20 + 20 + 30 + 30) = 10 (100) = 1000 sq ft
Total area covered by 2 coats of paint = 2 ( 600 + 1000) = 2 (1600) = 3200 sq ft
Total cost =
3200 / 400 * 53 =
8 * 53 =
$424
