meters or feet
An average semi 'tractor' is about 30 feet long.
The customary unit would be miles (mi), and the metric unit would be kilometers (km).
An articulated lorry is a truck and trailer - a combination involving a tractor unit and a semi-trailer, known in the United States as a semi-trailer truck.
Fahrenheit is a customary unit
it is in the us customary unit or else we wouldnt be learning about. there for it is in the us customary unit.
That depends on the wheelbase of the power unit.
It would be yards.