To compare the volumes of the cylinders, cones, and spheres with the same height and radius:
1. The number of cones needed to equal the volume of one cylinder is 3. The volume of a cone is 1/3 of the volume of a cylinder with the same height and radius.
2. The number of cones needed to equal the volume of one sphere is 3. The volume of a cone is 1/3 of the volume of a sphere with the same radius.
Therefore, in order from least amount of cones needed to greatest amount of cones needed:
Least amount of cones needed: 1 sphere
Next: 1 cylinder
Greatest amount of cones needed: 3 cones