Question

A cube has side length 15 kilometers. What is its surface area?

Answer 1

idk

Answer 2

Surface area is just the sum of the area of all of the sides of a shape.

A cube has 6 equal sides. Each side is a square.

The area of a square is a*a.

So the surface area of a cube is 6 * (a*a).

Answer 3

and your answer will be in squared units (squared km in this case)

Answer 4

is it this 180k2

Answer 5

no (you added a+a) you need to multiply. So it should read:

\[6a^{2}\]

So, 6*15*15 sqkm