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550 feet per minute is about one-fourth as fast as Usain Bolt.
In other words, it's 0.2710 times the speed of Usain Bolt, and the speed of Usain Bolt is 3.690 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 2,030 feet per minute 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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