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3 December, 16:34

How many gallons of paint are needed to paint the walls of a rectangular prism-shaped room that is 20 ft by 10 ft and 8 ft high if 1 gallon of paint covers 40 sq ft.?

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  1. 3 December, 19:47
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    12 gallons

    Step-by-step explanation:

    The perimeter of the room is ...

    20 ft + 10 ft + 20 ft + 10 ft = 60 ft

    Then the area of the walls is the product of this and their height:

    area = (60 ft) (8 f) = 480 ft²

    The number of gallons required is ...

    (480 ft²) / (40 ft²/gal) = 12 gal

    12 gallons of paint are required.
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