It is given in the question that the formula of volume of cone is
[tex]V = \frac{1}{3} \pi r^2 h[/tex]
Where V is the volume, r is the radius and h is the height.
And we have to find an expression for h.
First we multiply both sides by 3, and on doing that we will get
[tex]3 V= \pi r^2h[/tex]
Now to isolate h, we have to get rid of pi r square by dividing.
[tex]h= \frac{3V}{ \pi r^2}[/tex]
Therefore the correct option is B.
