40 miles is 64.3 kms
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40 trillion km equates to 24,854,800,000,000 miles.
40 miles = 64.4 km (approx) so 40 mph = 64.4 kmph (approx).
70 miles = 113 kilometres so 70 mph = 113 km per hour
Answer: 40 mph = 64.3737 km/h
70 km/h = 43.5 mph