geometry

posted by .

The floor of a bedroom is 12 feet by 15 feet and the walls are 7 feet high. One gallon of paint covers 450 square feet. How many gallons of paint do you need to paint the walls of the bedroom?

  • geometry -

    How do you think this problem should be solved?

    Remember: there are two walls of one size and two walls of another size.

  • geometry -

    12x 12 x15x15

  • geometry -

    No. Picture each wall as a rectangle. Find the area of each wall.

    What about the height of the walls?

  • geometry -

    12 x 15 x 7 =450
    would it be 2.8 galloons

  • geometry -

    Let's start over.

    Two walls are 12 feet by 7 feet.
    A = 2(12 * 7) = 168 square feet

    Two walls are 15 feet by 7 feet.
    A = 2 (15 * 7) = 210 square feet

    210 + 168 = 378 square feet of walls

    It sounds like just one gallon of paint will cover the four walls.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Geometry

    a room is 18 feet long and 14 feet wide with walls 10 feet high. If one can of paint covers 450 square feet, how many cans of paint would be needed in order to paint the four walls?
  2. Geometry

    A gallon of paint costs $20 and covers 465 square feet. Three coats of paint are recommended for even coverage. The room to be painted is 12 feet high, 20 feet long, and 20 feet wide. Only 4 gallons of paint are left to paint the room. …
  3. Geometry

    A gallon of paint costs $20 and covers 465 square feet. Three coats of paint are recommended for even coverage. The room to be painted is 12 feet high, 20 feet long, and 20 feet wide. How many gallons are needed to paint the walls?
  4. Math

    How many gallons of paint are necessary to paint the walls of a 15' by 12' room room with an 8' ceiling if one gallon of paint covers 80 square feet?
  5. Math

    My original question: How many gallons of paint are necessary to paint the walls of a 15' by 12' room with an 8' ceiling if one gallon of paint covers 80 square feet?
  6. pre-algrebra

    melind wants to paint the exterior lateral surface of her house. It is nine feet high and has a perimeter of 140 feet. each gallon of paint covers 300 square feet how many one gallon cans of paint does she need to buy to paint her …
  7. Algebra 1

    Minnie is painting her wall-in closet. Each gallon of paint covers 275 square feet.The closet is in the shape of a right rectangular prism. The floor is 9 feet wide and 7 feet long. The ceiling is 8 feet high. How many gallons of paint …
  8. Math

    Minnie is painting her walkin closet. Each gallon of paint covers 275 square feet. The closet is in the shape of a right rectangular prism. The floor is 9 feet wide and 7 feet long. The ceiling is 8 feet high. How many gallons of paint …
  9. Math

    A gallon of paint covers about 400 ft². How many gallons would you need to paint the walls of a room 10 feet wide, 14 feet long, and 8 feet tall?
  10. Algebra

    A painter needs to purchase enough paint to paint a bedroom that consists of four walls. Two of the walls are 11 feet by 10 feet and the other two walls are 12 feet by 10 feet. The paint is sold in 1 gallon cans, and each gallon of …

More Similar Questions