9514 1404 393
Answer:
(c) 75
Step-by-step explanation:
The surface area is the sum of the areas of the four triangular faces and the square base. For base side length s, the base area is ...
A = s²
For slant height h and base s, the area of one triangular face is ...
A = 1/2(s)(h)
Then the total surface area is ...
SA = s² + 4(1/2sh) = s(s +2h) . . . . . surface area of square pyramid
For a side length of s = 3 in and a slant height of h = 11 in, the total surface area is ...
SA = (3 in)(3 in + 2×11 in) = (3 in)(25 in)
SA = 75 in²
