Question

Surface area of a solid figure

Answer 1

Answer: OPTION C

Step-by-step explanation:

There is a general formula for calculate the surface area of a regular pyramid. This is:

$SA=\frac{1}{2}p*l+B$

Where p is the perimeter of the base, l is the slant height and B is the area of the base.

The base is a square, therefore B is:

$B=(5.3yd)^{2}=28.09yd^{2}$

 The perimeter is:

$P=4(5.3yd)=21.2yd$

Then, the surface area is:

$SA=\frac{1}{2}(21.2yd)(11.1yd)+(28.09yd^{2})=145.75yd^{2}$