the bedroom is 18ft by 12ft by 8ft the room has 2 doors 3ft by 7 get and 3 window 3 ft by 4 ft windows and door don’t need painting a gallon of paint cover 300ft is 3 gallons of paint enough to cover the room?

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 (:

Step-by-step explanation:

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584