A metre.
It would be normal to use either meters or feet, but you can use any unit for length (inches, cm, mm, km, etc.)
Kilograms.
miles or kilomiters
A metres, for an approximate measure, a centimetre for a more accurate measure.
I would use a centimetre to measure the length of a boy. Not sure what a boy yard is, though.
It would be normal to use either meters or feet, but you can use any unit for length (inches, cm, mm, km, etc.)
Kilograms.
tons
Inches
cm
The ISO length unit to use would be the cementer.
I would use feet
You would use meters.
always the meter to measure length. This is an SI (international) unit of measurment, and is the standard international unit of measurment for length.
a cm
Kilometers are a unit of length, used to measure distance.
miles or kilomiters