Question

A homeowner called in a painter to paint the walls and ceiling of one bedroom. His bedroom is 18ft. long, 12 ft. wide, and 8 ft. high. The room has two doors, each 3 ft. by 7ft. and three windows each 3ft. by5 ft. The doors and windows do not have to be painted. A gallon of paint can cover 300ft2. A hired painter claims he will need 4 gallons. Show that his estimate is too high.

Answer 1

Find total surface area (18*12)*2+ (18*8)*2+ (12*8)*2=     192 +288 432+288+192= 912
then subtract surface area of doors
(3*7)2=42   then subtract windows 3*5(3)=45 then subtract the floor 18*12=216
912-42-45-216= 609 sq ft  he should only need  2 and a small portion of a third to paint your room  i believe what his math must have been was 18*12*8=1728 then subtract -42-45-216 for the floor windows and doors to get 1425 and even then he underestimates with his inaccurate figures 
so first 609 sq ft  he should only need  2 and a small portion of a third to paint your room and 2 get a new painter bcus this guy cant math hope i helped if so give brainliest answer-J (: