Answer:
156 [tex]in^2[/tex]
Step-by-step explanation:
find the areas of all the faces and add them up
area of a rectangle: [tex]bh[/tex]
area of a trapezoid: [tex]\frac{1}{2} (b_1 + b_2)(h)[/tex]
[tex](5*3)+(6*3)+(5*3)+(3*12)+2(\frac{1}{2}*(6+12)*4) \\=15+18+15+36+2(\frac{1}{2}*18*4)\\=84+2(36)\\=156[/tex]
the area of the trapezoid is multiplied by 2 because there's a top and bottom
