Autumn N.

asked • 10/03/18

a gallon of latex paint can cover 400 square feet. Maria has a rectangular room whose dimensions are 17 feet by 25 feet, with 9-foot ceiling.

How many gallon containers of paint does she need to buy to paint two coats on each wall?
Maria should buy _ gallon containers of paint. 

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David W. answered • 10/04/18

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You have 2 walls that are 17 x 9 and 2 that are 25 x 9 and you need each covered twice...
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Autumn N.

Would you need 3 gallons?
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10/04/18

David W.

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So, we have 17(9) = 153 and 25(9) = 225
 
2(153 + 225) = 756
 
Since we need 2 coats, 2(756) = 1512
 
1512/400 = 3.78
 
Buying 3 gallons would cover 1200 square feet, so we'll need to buy a fourth to cover the rest and have some paint left over.
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10/04/18

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