Question

The cylinder is 10 meters wide and the volume is 300 cubic meters what's the height of the cylinder?

Answer 1

Cylinder is 10 meters wide, so its diameter is 10 meters. You get radius of it by dividing 10 by 2, which equals 5.
As you count volume of cylinder from that equation
$V=A*h= \pi r^{2}*h$ 
You get an equation to count height:
$h= \frac{V}{ \pi r^{2} }$ 
h≈3.82 meters