# Similar frustums

The upper and lower radii of a frustum of a right circular cone are 8 cm and 32 cm, respectively. If the altitude of the frustum is 10 cm, how far from the bottom base must a cutting plane be made to form two similar frustums?

### Correct answer:

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**Math Student**

m is radius of middle circle = radius of a bottom of upper frustum and radius of top of bottom frustum.

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