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17,000 furlongs per fortnight is about one-fourth as fast as Usain Bolt
In other words, it's 0.2740 times the speed of Usain Bolt, and the speed of Usain Bolt is 3.650 times that amount.
(at the Beijing Olympics, 2008) (a.k.a. Usain St. Leo Bolt, OJ, C.D.) (sprinter; 1986-)
Setting a world record, Usain Bolt ran a 100 m in 0:09.69 for an average speed of 62,100 furlongs per fortnight at the 2008 Olympics. Furthermore, Bolt's margin of record breaking — 0.03 s — is the largest margin of victory in the history of digital measurements.
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