D. the perimeter of a regular n-gob is the area divided by the all them.
The percent increase was 30% .
18+12*4=18+48=66 ft
1st floor is 18ft
next 4 are 12ft
The complete question in the attached figure
calculate the surface area----------- > S
S=2*[6*2/2]+[3.5*2]+[3.5*6]+[6.3*3.5]= 62.05 in²
the answer is 62.05 in²