If juan can consume in one sitting one medium(12-inch diameter), deep-dish (1-inch thick)pizza, what is the minimum volume of his stomach?

This is a dumb question (my opinion only).

If he has an empty stomach, wouldn't the minimum volume be the volume of the pizza?

Cylinder volume = pi r^3 h

I answered this question a few days ago, using the volume formula for
a sphere.

MattsRiceBowl suggested the shape of a pizza is more like a cylinder, and I agree.