You have mentioned cylinder.
You have mentioned cone (a cone is not a cylinder, a cylinder is not a cone0?
You have mentioned AutoCAD (Inventor is not AutoCAD, AutoCAD is not Inventor)?
You have mentioned (the top face of a cylinder) are you referring to one of the planar faces?
Can you attach your *.ipt file here?
Can you link (or attach) images of something similar that already exists in the real world that resembles your Design Intent (or is this a completely novel design never before seen by man, woman or beast?).
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