$\displaystyle V= \frac{1}{3}a^2b\pi$\displaystyle V= \frac{1}{3}a^2b\pi

$V=a^2b\pi$V=a^2b\pi

$\displaystyle V= \frac{1}{3}b^2a\pi$\displaystyle V= \frac{1}{3}b^2a\pi

$V=a^2\pi+\pi ac$V=a^2\pi+\pi ac