km
Absolutely enormous! If the grid is such that one hundred squares on the grid are equivalent to one unit, you will require 12500 such squares.
The step between grid lines on a scale represents the interval by which the scale is divided. This step helps to quantify and measure the distance or value between different points on the scale. It essentially denotes the unit of measurement being used on the scale.
As far as I am aware, CO is not a unit of measure.
A unit can be a measure of length. It is one-dimensional. A squared unit can be a measure of area. It is two-dimensional. A cubic unit can be a measure of volume. It is three-dimensional.
This depends on what unit you are using to measure in. However, area will always be measure in (unit)^2.
division
The international (SI) unit of mass is the kilogram.
The measure unit of a kilometer stick is kilometer.
The unit of measure for work output is the joule (J).
The Unit Used To Measure A Train Can Be Kilometer.
Hertz, hz= 1/second is the unit measure of frequency.
Class room can be measure in Meters easily :)