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17,000 furlongs per fortnight is about one-and-a-half times as fast as Michael Phelps
In other words, it's 1.45550 times the speed of Michael Phelps, and the speed of Michael Phelps is 0.687050 times that amount.
(at the Beijing Olympics, 2008; 200 m freestyle) (a.k.a. Michael Fred Phelps) (swimmer; 1985-)
Setting a world record, Michael Phelps swam the 200 m freestyle in 1:42.96 for an average speed of 11,680 furlongs per fortnight. Phelps would go on to win nine gold medals individually in the 2008 Olympics - more than all but eight of the competing nations.
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