That depends on the radius of the wheel making the revolutions.
If your vehicle has an automatic transmission with overdrive, then at speeds above 45 mph, it should be in overdrive, which reduces engine RPM's to save fuel.
Out 2000 Dodge Neon does 2500 rpms at 60 mph. Grace
45 mph is 72.4205 kph
60
One is overdrive. I believe the one with the "circle". Overdrive is used to reduce RPMs, generally at speeds 45 mph or greater.
45 miles is 72.4 kilometres. 45 miph is 72.4 kmh-1.
45 MPH
45 mph is the same as 45 mph. How can one of the two be faster?
45 km/h is 27.9617 mph
No, it is less. 45 kmh = 27.9617 mph
45-50 mph.45-50 mph.
45-50 mph.45-50 mph.