How do I set up a triple integral using cylindrical coordinates?

[-EquinoX-]

Homework Statement

http://img3.imageshack.us/img3/7558/47586628.th.jpg

Homework Equations

The Attempt at a Solution

I am quite confused whether I should use cartesian, cylindrical, and spherical coordinate.. how do I approach this problem

 

[yyat]

Use cylindrical coordinates. Hint: Integrate the function z=r over a suitable range of r and theta (this will be a double integral).