| An old chestnut goes like this:
A sphere has a cylindrical hole drilled right through its center. The hole is six inches long -- that is, from one point on one edge of the hole to the closest point on the other edge is a distance of six inches.
What is the volume of the remaining part of the sphere outside the hole?
It may sound like you don't have enough information to solve this puzzle, but you do.
Answer
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