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Tetrahedron bounded by spheres (Posted on 2003-04-17) Difficulty: 3 of 5
A regular tetrahedron holds a sphere snugly within its four sides. A larger sphere surrounds the tetrahedron, just touching its four vertices. What is the ratio of radii of the two spheres?

See The Solution Submitted by Bryan    
Rating: 3.5000 (6 votes)

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answer Comment 7 of 7 |
The required ratio is 1:3
  Posted by K Sengupta on 2007-07-30 13:30:40
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