which expression represents the volume of the cylinder in cubic inches

Given:
Radius(r) of the cylinder =6 in.
height of the cylinder(h)=18 in.
We know the formula for Volume of a cylinder
[tex]\text{Volume of a cylinder}=\pi(r^2)(h)[/tex][tex]\text{Volume of a cylinder=}\pi\times6^2\times18\text{ cubic inches}[/tex]