If r = 13 units and x = 7 units, then what is the volume of the cylinder?
If you have a cylinder and know its radius and its length, then you can work out its volume.
Volume is given by, V = πr^2.x,
where r is the radius and x is the length.
We have r = 13 units, and x = 7 units. Then
V = πr^2.x = π(13)^2(7) = 1183π
Volume is: V = 1183π units cubed