math

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 paint will cover an area that is approximately 250 to 300 square feet. The price of the paint per gallon is $36.00.

The painter estimates that he will only need one coat of paint to cover each wall.

How many gallons of paint should the painter buy?

gallons

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  1. 2 gallons I believe since there is enough to cover 250-300 square feet, and math says there is 460 square feet covered by all four walls.

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  2. area of all 4 walls, ignoring doors and windows
    = 2(11)(10) + 2(12)(10) ft^2
    = 460 ft^2

    number of gallons at 300 ft^2 = 460/300 = 1.5
    unless you buy quarts, 2 gallons will be needed
    cost = .....

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