# physics

A spherical shell is formed by taking a solid sphere of radius 20.0 cm and hollowing out a spherical section from the shell's interior. Assume the hollow section and the sphere itself have the same center location.

a) If the hollow section takes up 90% of the total volume, what is its radius?

b) What is the ratio of the outer area to the inner area of the shell?

1. 👍 0
2. 👎 0
3. 👁 264

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