Question

Help I'm practicing

Answer 1

The total surface area is;

`336\text{ }ft^2`

Step-by-step explanation:

Given the square pyramid as show in the attached image.

The total surface area is the sum of the area of the base square and the area of the four triangles.

`A=l^2+4((1)/(2)lh)`

Given;

`\begin{gathered} l=12\text{ ft} \\ h=8\text{ ft} \end{gathered}`

substituting the given values;

`\begin{gathered} A=l^2+4((1)/(2)lh) \\ A=12^2+4((1)/(2)*12*8) \\ A=144+192 \\ A=336\text{ ft}^2 \end{gathered}`

Therefore, the total surface area is;

`336\text{ }ft^2`