We know that the equation for volume is:
[tex]V=\pi r^2h[/tex]We just have to clear h from this equation to get the expression we're asked to calculate. Let's do it:
[tex]V=\pi r^2h\rightarrow\frac{V}{\pi r^2}=h[/tex]Therefore, the expression that allows us to calculate the height is:
[tex]h=\frac{V}{\pi r^2}[/tex]