What is the surface area for a cube that is 15mm?

Answer 1

If you are referring to a cube with 15mm sides then this is how you would work it out.

A cube has 12 edges of the same length, and 6 faces of the same area. We know area is length^2 (length to the power of 2 / length X length. What you have to find is the total surface areo of all of the faces.

If you can work out the area of one face you will know the area of the others.

Since the area of one face is the area of one square, we can use the fomula length^2 which is also known as length X length. we also know in this instance the length of the square is 15mm. so we substitute 15 into the formula length X length:

15 X 15

=225 Square mm (we write square millimetres as we are refering to area [2 dimensions]

But we have so far only worked out the area of one face. since there are 6 faces on a cube we multiply the area of one face by 6. So in this Case:

225 square mm X 6

=1350 square mm

that is how you find the surface area of any cube.