Hello!
First we have to find the radius of the base
To do this we use the equation
[tex]r = \frac{C}{2 \pi } [/tex]
r is radius
C is circunferce
Put in what you know
[tex]r = \frac{8.5}{2 \pi } [/tex]
r ≈ 1.35
Now we use the equation to find the volume of a cylinder which is
[tex]V = \pi r^{2} h[/tex]
V is volume
r is radius
h is height
Put in the values you know
[tex]V = \pi 1.35^{2} * 11[/tex]
V ≈ 62.98
The answer is about 62.98
Hope this helps!