Use the formula

$V={\displaystyle \underset{a}{\overset{b}{}}}A(x)dx$

to find the volume of the solid. The lower limit of integration is $a=$

The upper limit of integration is $b=$

The side $s$ of the square cross$-$section is the following function of $x$ : $$

$A(x)=$

$$

Thus the volume of the solid is $V=$