SOLUTION: Write an algebraic expression then solve. There is a room that is 22 feet long, by 15 feet wide, and 8.5 feet tall. This room has a door that is 36 inches by 84 inches, and two wi

Algebra ->  Average -> SOLUTION: Write an algebraic expression then solve. There is a room that is 22 feet long, by 15 feet wide, and 8.5 feet tall. This room has a door that is 36 inches by 84 inches, and two wi      Log On


   

Question 1018568: Write an algebraic expression then solve. There is a room that is 22 feet long, by 15 feet wide, and 8.5 feet tall. This room has a door that is 36 inches by 84 inches, and two windows that are 30 inches by 42 inches each. A small can of paint will cover approximately 195 square feet of wall. How many small cans of paint will you need?
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of the room is 2 x (22+15) = 74 feet.
74 * 8.5 = 629 sq ft.
The door is 36 * 84 = 3024 sq inches
The windows are 30 * 42 * 2 = 2520 sq inches
Total 5544 sq inches to subtract. 144 sq inches are 1 sq ft, so 5544/144= 38.5 sq ft.
629 - 38.5 = 590.5 sq feet, or 3.03 cans.
The problem states "approximately," so we don't know if they underestimate or overestimate. It's too close to say whether the 4th can will be needed.