How are length, area, and volume related in terms of the three dimensions of space?

Question

and

How is it possible for objects of the same volume to have different masses?

#2 Gads! Think of a cup full of steel marbles and a cup full of cotton balls.

ummm, ?

Answer 1

the volume of the substance may Have a different weight. Such as a cup full of cottoncandy and a cupfull of rocks