40 miles = 64.4 km (approx) so 40 mph = 64.4 kmph (approx).
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Answer: 2000 km/h = 1,242.742 mph
110 km/h is equal to 68.3mph.
About 34.76 knots.
It changes more from 20 km/h to 30km/h. -Answer from Penn State University Physics 001 Homework
If 1 hour ===> 40 km, then 2 hours ===> 80 km.