Question

A room is 15 by 20 feet with a 9 foot celling. How much would it cost to paint all the walls if a gallon of paint cost $23.45 and covers about 250 square feet?

Answer 1

$70.35 (3 cans)

Explanation:

2 walls at 15' x 9' = 270 ft^2

2 walls at 20' x 9' = 360 ft^2

Total area = 630 ft^2

Total cost = (630 ft^2)*($23.45/250 ft^2) = $59.09

But we need to assume that we need to purchase whole gallons, not fractions of a can.

Each can covers 250 ft^2, so we'll need 3 can (750 ft^2) since 2 (500 ft^2) won't cover everything.

3 cans at $23.45 each is $70.35