I have to calculate the volume and the surface of some KO drums (knock out drum).
To avoid ambiguous understandings here's a picture of one:
http://www.zamilsteel.com/ped/images/projects/11.jpg
I created a "skeleton" of this:
https://i.stack.imgur.com/gDhWs.png
I know how to calculate the volume and surface of a cylinder based on the given parameters (d, h, w), so actually I only would like to know the formulas of the yellow part.
Any help is appreciated!