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It's not clear exactly what you're asking.

Density = mass/volume.

A "sphere" is defined as having no thickness.

It's possible that you need to find the volume of a spherical SHELL, which is the space between two spheres. To do that, just take the volume of the bigger sphere and subtract the volume of the smaller sphere. Each is a function of radius.

If the radius of the outer sphere is fixed and you have to solve for the radius of the inner sphere -- well, once you've done that, you also know the difference between the two radius figures, and that's exactly the thickness of the shell.

2007-02-26 12:46:59 · answer #1 · answered by Curt Monash 7 · 0 0

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