Question

Hello! This is the problem I am having a lot of problem with.I may warn you there is some rubbish so ignore it.

Answer 1

Surface Area of a Cube

A cube has 6 faces or surfaces, all of them have the same size and therefore, the same area.

The surface area of one of the faces is the area of a square of side length 9 ft:

$A=(9\text{ ft})^2=81\text{ }ft^2$

The total surface area is 6 times this area, thus:

$\begin{gathered} SA=6\cdot81\text{ }ft^2 \\ SA=486\text{ }ft^2 \end{gathered}$