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The Far Sides (Posted on 2013-08-08) Difficulty: 3 of 5
Four non-overlapping spherical planets of identical radius are situated in space. The surface of each planet is colored either white or black. The surfaces are white wherever that point is visible to an observer on another one of the planets. They are black where no other planet can see that part of the surface.

What is the total area of the black surfaces? What if there were 10 planets instead of 4?

No Solution Yet Submitted by Brian Smith    
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  Subject Author Date
SolutionIf...Charlie2013-08-08 16:09:25
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