X

Y

X

Y

X

Y

X

Y

L

H

\[
V=\left(\pi\int_{x_a}^{x_d}{({f\left(x\right)})^2-({f\left(x\right)-h})^2}dx\right)+\left(\pi\int_{0}^{l}{({f\left(x\right)-h})^2}dx\
\right) \]