With a ruler, or a measuring tape.
Use a tape measure.
a hallway
3 feet
I would measure it with a ruler.
The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.The answer will depend on what you wish to measure: the length, thickness, mass, hardness etc.
You would need to measure it.You would need to measure it.You would need to measure it.You would need to measure it.
I would use meters.
The meter.
Yes
Metres would probably be the most convenient.
Please measure the length of this hallway.
Meters
a hallway
NO, VOLUME cannot be converted or compared to LENGTH -they are totally different
You can measure it in inches, yards or feet - it depends on the accuracy required.
The appropriate unit is a metre.
21 feet
3 feet