Question

How i find high of sylinder ?

Answer 1

Is the volume given too?

Answer 2

If you're given the area and radius you can rearrange the area formula:
\[A=2\pi r^2+2\pi rh\]to get:\[h=\frac{A-2pi r^2}{2\pi r}\]
If you're given the volume and the radius you can do the same thing to:\[V=\pi r^2 h\]to get:\[h=\frac{V}{\pi r^2}\]