The best way to tackle this one is to change to cylindrical coordinates. So we'd get:
How to evaluate:
∫∫∫ xyz/(x^2+y^2)^1/2 dv
E
where E is the solid "quarter-cylinder" in the first octant bounded by a cylinder of radius a>o with axis long the z axis, the planes y=0,x=0,z=0 and z=b, wiht b>0.
Thankyou very much!