Weird integral with cylinders
I have this unusual indispensable to locate. I am in fact searching for the quantity that is defined by these 2 formulas.
$$x^2+y^2=4$$ and also
$$x\geq0, y\geq0, z\geq0$$
It is an unusual object that has the aircraft $z=y$ as a divider panel for both cyndrical tubes. My troubles is that I can not locate the integration limits.
I can not also attract this point effectively.