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800 Km/hr
The average speed if an airplane travels 1364 miles in 5.5 hours is 248 miles/hr.
Assuming you're talking about a commercial airliner, an average one of those travels at around 500mph when cruising. This makes for about 4.2 hours for travelling 2121 miles.
40mph
4
42mph
1
60 KPH
58.8 kph
b
100 Km.
60 mph