There are 1.609344 kilometres in one mile. therefore, 40 miles is equal to 40 x 1.609344 = 64.37376 kilometres per hour.
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Answer: 40 mph = 64.3737 km/h
it runs 40 miles per hour
52 miles at 40 miles per hour = (52 / 40) = 1.3 hours = 1 hour 18 minutes
1 mile is 5280 feet. So, 40 miles per hour is the same as 211,200 feet per hour.
It's "forty" kilometers per hour. The conversion would be to divide the kilometers per hour by 60 (the number of minutes in one hour). In this case, it would be 40/60 = .666666666666666.... or two-thirds of one kilometer per minute.