# What would you use to measure the length of a classroom'is it a meter ruler or a 30cm ruler?

You could use either, it's just a little more work with the 30
cm ruler, but the result will be the same.

You could use either, it's just a little more work with the 30 cm
ruler, but the result will be the same.

You could use either, it's just a little more work with the 30 cm ruler, but the result will be the same.

### How long is a length in meters?

The meter is a unit of measurement. A length is as long as it may be, a certain number of meters, or a fraction of a meter. Until the length is known in some other unit of measure, it is impossible to say how long it is in meters, unless it is right in front of you and you can measure it with a meter stick or other form of ruler.