4 per square metre.
it is the density as density is defined as mass per unit volume.
Mass per unit of volume is the most common way to measure density, which shows how close the particles, molecules, and atoms are to each other. Therefore, it can be found by taking a certain amount of space (volume) and dividing it by how many atoms (mass) can be found in it.
density
density is usually in some form of mass per volume. so for example you could say grams per cubic inch or milligrams per cubic centimeter.
The common units for density is grams per liter. Density can be given in any units of mass per any unit of volume (i.e. kg per milliliters).
The population density of India as per 2001 census is 324 persons per sq.km
Oman's population density is 13 per square kilometer.Uman's population density is 2,154 people per square kilometer.
The population density of Malm is 1,099 people per square kilometer.
The population density of Cheongju is 4,325.5 people per square kilometer.
The population density of Heerenveen is 316 people per square kilometer.
The population density of Vlissingen, Netherlands is approximately 1,424 people per square kilometer.
Trondheim's population density is 539.1 people per square kilometer.
Population: 11,000 Population Density: 1,100 (per square mile)
Hemnes's population density is 3.2 people per square kilometer.
Laxe's population density is 94.93 people per square kilometer.
Muan's population density is 161 people per square kilometer.
Szentes's population density is 83 people per square kilometer.