Jared's room painting

Jared wants to paint his room. The dimensions of the room are 12 feet by 15 feet, and the walls are 9 feet high. There are two windows that measure 6 feet by 5 feet each. There are two doors, whose dimensions are 30 inches by 6 feet each. If a gallon of paint covers approximately 350 square feet, how many gallons of paint will it take to give two layers of paint to the walls?

Correct result:

x =  3.2914 gal

Solution:

a=12 ft b=15 ft c=9 ft  w1=6 ft w2=5 ft  d1=30 inch ft=30/12  ft=2.5 ft d2=6 ft  h=350 ft2/gal  S1=a b+2 (a+b) c=12 15+2 (12+15) 9=666 ft2 W=w1 w2=6 5=30 ft2 D=d1 d2=2.5 6=15 ft2  S=S12 W2 D=6662 302 15=576 ft2  x=2 S/h=2 576/350=576175=3.2914 gal



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