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45 miles per second is about 800 times as fast as The TGV (train)
In other words, it's 810 times the speed of The TGV (train), and the speed of The TGV (train) is 0.0012 times that amount.
(Train à Grande Vitesse) (for SNCF TGV Réseau, a.k.a. "Network" model, a.k.a. TGV-R) (maximum speed)
The TGV Réseau sets have a top speed of 0.055 miles per second. The train is capable of travelling the 425 km (264 mi) distance from Paris to Lyon in East-Central France in about two hours.
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