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The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

Many of these puzzles also appear in Braingle's own collection.

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Categories : geometry : cover.earth.p

A thin membrane covers the surface of the (spherical) earth.  One
square meter is added to the area of this membrane to form a larger
sphere.  How much is added to the radius and volume of this membrane?

Solution

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