What is the volume of a smartie? According to wikipedia: > Smarties are oblate spheroids with a minor axis of about 5 mm (0.2 in) and a major axis of about 12 mm (0.5 in). What is the volume of one smartie?

Calcutlate the sphere volume with the major radius and then multiply the result by minor/major.

With $r=5/2\text{ mm}$ and $R=12/2\text{ mm}$

$$V=\frac43\pi R^2r=377\;\text{mm}^3$$