Answer to Puzzle #41: Rope Around the Earth 41. Suppose you tie a rope tightly around the Earth's equator. You add an extra 3 feet to the length. All around the Earth the rope is raised up uniformly as high as is possible to make it tight again. How high is that? This puzzle is old, a version of it appears in William Whiston's The Elements of Euclid circa 1702. More latterly it appears in Showtime drama 'House of Lies' about a group of management consultants. Before reading the answer can I interest you in a clue? This puzzle is not so much hard as the result is surprising.
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