- V=23πa3V=23πa3V = \frac{2}{3}\pi {a^3}.
- V=2πa3V=2πa3V = 2\pi {a^3}.
- V=4πa3V=4πa3V = 4\pi {a^3}.
- V=πa2V=πa2V = \pi {a^2}.