Volume of Sphere Demonstration

The base radius and the height of the cylinder are designed to be equal, r.
Therefore the volume of the cylinder is given by

pi * r^2 * r = pi * r^3

If we make 4 such cylinders, then the total volume will be 4 * pi * r^3

Then we made a sphere with radius equal to the base radius of the cylinder. Print 3 such spheres with 0% infill such that water can be poured into them.

The water poured out from these 3 spheres should be able to fill the 4 cylinders,
therefore the volume of each