Math help?

Sketch it. The volume is

V = ∫∫∫ dV.

Best to use cylindrical or spherical coords.
I will use cylindrical. dV thus equals r dr dθ dz right?
Looking at your sketch, r goes from what to what? θ ? And z?
Those are your ranges for your integrals. Compute.
Done!

Show your steps here if need be and we will further detail if required.



Hopefully no one will spoil you the answer thereby depriving you from your personal enhancement; that would be very inconsiderate of them.