Answer:
451 in.^2
Step-by-step explanation:
base area of a pyramid=a^2
=11^2
=121 in.^2
area of triangular face=[tex]4(\frac{1}{2} )*a*l[/tex]
=[tex]2*11*15[/tex]
=[tex]330 inch^2[/tex]
surface area= base area + area of triangular faces
=121 in.^2 + 330 in.^2
=451 in.^2
