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55 kilometers per hour is about nine-tenths as fast as Secretariat.
In other words, it's 0.9090 times the speed of Secretariat, and the speed of Secretariat is 1.10 times that amount.
(at Belmont Stakes, 1973)
Setting a record finish, Secretariat ran the Belmont Stakes — a 12 furlong race length — in 2:24, for an average speed of 60.4 kph in 1973. His margin of victory in the race, also a record-setter, was 31 lengths.
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