Hey dudes. Sweet forum! Sick place to get help from

Just asking about Area and Volume Ratio's on shapes.

I understand it, but like, I just don't understand it fully.

If anyone could run me through it that would be awesome.

Another problem I have is this question:

"If the sides of a cube have doubled, how has the volume changed"

I don't really understand it. If any maths wiz's here could help me out on these things, that would be absolutely awesome.

Cheers