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0.0043 mach is about one-fifth as fast as Noah Ngeny.
In other words, it's 0.18810 times the speed of Noah Ngeny, and the speed of Noah Ngeny is 5.3160 times that amount.
(in Rieti, Italy; 1999) (sprinter; 1978-)
Setting a world record at the Rieti Grand Prix in 1999, Noah Ngeny ran 1,000 m in 2:11.96 for an average speed of 0.02286 mach. According to some reports, Ngeny did not begin running competitively until just three years before setting the record.
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