Miles or kilometers.
Kilometers
Kilometres are the appropriate unit.
Neither. The relevant standard unit is a kilometre.
Kilometers are typically used to measure distance, so you can measure things like the length of a road or the distance between two cities in kilometers.
The most appropriate unit of length for measure the distance between Las Vegas and Los Angeles would be either miles or kilometers.
inches
A centimetre.
yards
Hs
miles
The most appropriate unit of length for measure the distance between Las Vegas and Los Angeles would be either miles or kilometers.
Distances and vast lengths in the USA are measured in miles.