SOLUTION: A gallon of paint can cover 512 square feet. Determine how many gallons should be purchased to paint two coats on each wall of a room which has dimensions 12 feet by 20 feet and a

Algebra ->  Linear-equations -> SOLUTION: A gallon of paint can cover 512 square feet. Determine how many gallons should be purchased to paint two coats on each wall of a room which has dimensions 12 feet by 20 feet and a       Log On


   

Question 1049601: A gallon of paint can cover 512 square feet. Determine how many gallons should be purchased to paint two coats on each wall of a room which has dimensions 12 feet by 20 feet and a 10 feet by 10 feet foot ceiling
Answer by hussamuddin(51) About Me  (Show Source):
You can put this solution on YOUR website!
area of each wall is 12%2A24=240 square feet.
area of four walls together is 240+%2B+240+%2B+240+%2B+240+=+960 square feet.
two coats on each wall would be similar of painting 960%2A2=1920 square feet.
area of roof is 10%2A10=100 square feet (double coat on roof is not mentioned).
area of each wall with two coats + area of roof with a single coat = 1920%2B100=2020.
A gallon of paint can cover 512 square feet so, four gallons of paint would be needed to cover 512%2A4=2048 square feet.
paint which can cover 2048-2020=28 square feet will be left.