SOLUTION: Suppose that a gallon of wall paint costs $16 and covers 350 square feet. Three rooms of the house measure 9ft by 12 ft, 14ft by 16ft, and 12ft by 14 ft. The ceiling is 9ft high.

Question 4665: Suppose that a gallon of wall paint costs $16 and covers 350 square feet. Three rooms of the house measure 9ft by 12 ft, 14ft by 16ft, and 12ft by 14 ft. The ceiling is 9ft high.
How many gallons of paint are needed to cover the walls of these rooms if you make no allowance for the doors and windows? Remember that you can't buy a part of a gallon. So always round your answers up to the next gallon.
Answer by Abbey(339) (Show Source): You can put this solution on YOUR website!
Area is found by multiplying height by width:
Two walls are 9' high x 9' wide and two walls are 9'high x 12' wide
(2*9*9) + (2*9*12) = 162+216 = 378 square feet
Room 2
Same process
Walls: (2*9*14)+(2*9*16) = 540 sq. feet
Room 3
walls: (2*9*12)+(2*9*14) = 468 square feet
Total for house = 468+540+378 = 1386 square feet
Divide by 350 square feet (the amount covered by each gallon)=3.96
Round up to 4 gallons
TOTAL
$16 (the cost of paint) *4 = $64.
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