Question

Surface area of a solid figure

Answer 1

Answer: OPTION C

Explanation:

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

`SA=(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=(1)/(2)(21.2yd)(11.1yd)+(28.09yd^(2))=145.75yd^(2)`