## 13 - Sphere cut into a circular cone

**Problem 13**

A sphere is cut in the shape of a circular cone. How much of the material can be saved?

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**Problem 13**

A sphere is cut in the shape of a circular cone. How much of the material can be saved?

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**Problem 12**

Find the altitude of the circular cone of maximum convex surface inscribed a sphere of radius a.

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