Insulate house

The property owner wants to insulate his house. The house has these dimensions 12, and 12 m is 15 m high. The windows have 6 with dimensions 170 and 150 cm. Entrance doors are 250 and 170 cm in size. How many square meters of polystyrene does he need?

Correct answer:

x =  689.4 m2

Step-by-step explanation:

a=12 m c=15 m  n=6 o1=170 cm m=170:100  m=1.7 m o2=150 cm m=150:100  m=1.5 m  v1=250 cm m=250:100  m=2.5 m v2=170 cm m=170:100  m=1.7 m  o=4 a=4 12=48 S1=o c=48 15=720 m2 S2=n o1 o2=6 1.7 1.5=10153=15.3 m2 S3=v1 v2=2.5 1.7=417=4.25 m2  x=S1S2S2=72015.315.3=689.4 m2

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