What is the volume of a cube with side length s?

• A. Volume equals s
• B. Volume equals s^3
• C. Volume equals s^2
• D. Volume equals s^4

Answer: (B)

Volume measures how much space is inside a three‑dimensional object. For a cube, that space comes from multiplying the three edge lengths. Since every edge is the same length s, the volume is s × s × s, which is s^3. This gives volume in cubic units.

The other options don’t fit because they represent different physical quantities: s is a linear dimension (length), s^2 is an area (two dimensions), and s^4 isn’t a standard measure for a simple solid like a cube.