First, let's calculate the speed of the TGV train.
Since there are 3600 seconds in an hour and it travels 89.44 meters/second, it must travel
3600*89.44m = 321,984 meters per hour. We need to divide this by 1000 to get the speed in km = 321.984 km/hr. Note that this is slightly faster than the Japanese train. So, if for instance, our train traveled 321km/hr, it would be the second fastest.
To convert this to mph, note that there are about 1.61 km in a mile. So....
321km/hr * 1 mile / 1.61 ≈ 199mph.
To find out the distance it can travel in 2.5 hrs., we have
Rate * Time = Distance
199mph * 2.5 hrs. = 497.5 miles
