Answer:
A+C=34
10C+20A=570
C- $170.50
Step-by-step explanation:
1.8 gallons would be used.
TOTAL AREA TO BE PAINTED:
2 x 10 x 20 + 2 x10x 16 = 720 ft2
720 ft2 / 400 ft2 /gal = 1.8 gal