Jerry Wass wrote:

Yeah, Mike, Works great ('cept for working backwards---I had an 8" S.S.
Sphere, put in O.D & Wt.--I.D wouldn't come up.--so I guessed I.D, *
approached till it = the wt.)---still a lot faster than working the
entire formula.--Thanks-Jerry

Huh? Volume of a sphere is (4/3) pi r^3.
Hollow sphere is (4/3) pi (R^3 - r^3).

How can it be faster?

Ted