Answer: C
Explanation:
The surface area of a pyramid = A + 1/2ps
Where A = area of the base
P = perimeter of base
S = slant height.
A = 4 × 4 = 16 m^2
P = 4L = 4 × 4 = 16 m
S = 3m
Surface area = 16 + 1/2 × 16 × 3
Surface area = 16 + 24
Pyramid surface area = 40 m^2
The surface area of the cuboid = LB + 2LH + 2BH
Where
B = width
H = height
L = length
Substitute all the parameters into the formula
Surface area = 4×4 + 2(4×5) + 2(4×5)
Surface area = 16 + 40 + 40
Surface area = 96 m^2
To Find the surface area of this composite solid, you will add the pyramid surface area to the cuboid surface area. That is
Total surface area = 40 + 96 = 136m^2
Therefore, the surface area of this composite solid is 136 cubic meters