SOLUTION: HELLO I AM A STUDENT OF CLASS 7TH. I WANT TO KNOW ABOUT THE CONCEPT OF SURFACE AREA OF A CUBE.I KNOW THE CONCEPT AND FORMULA OF VOLUME OF A CUBE BUT NOT THE SURFACE AREA OF A CUBE

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Question 151359: HELLO
I AM A STUDENT OF CLASS 7TH. I WANT TO KNOW ABOUT THE CONCEPT OF SURFACE AREA OF A CUBE.I KNOW THE CONCEPT AND FORMULA OF VOLUME OF A CUBE BUT NOT THE SURFACE AREA OF A CUBE AND OTHER 3D SHAPES.
PLEASE EXPLAIN THE WHOLE CONCEPT
I WILL BE THANKFUL TO YOU
WAITING FOR YOUR REPLY

Answer by nabla(475) (Show Source):
You can put this solution on YOUR website!
A cube will have length width and height that are the same.
Thus, we need only find the area of one face, then multiply by 6 (there are 6 sides).
So if l=w=h, l*l is the area of any side.
So, 6l^2 will be the formula of the surface area of a cube.
We can just say 6a^2 to avoid ambiguity.