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Population density is generally written in which unit?

Answer and explanation

Correct answer: Persons per square kilometre

Direct answer: Option A is correct. Population density tells us how many people live in one unit of land area. The usual formula is \\(\\text{Population density}=\\frac{\\text{total population}}{\\text{area in square kilometres}}\\). Therefore its unit is persons per square kilometre, written as persons/km². Option A is correct because it combines a population count with an area measure. Option B, kilogram per metre, measures mass and length, not people and land. Option C, litre per hour, measures flow or volume over time. Option D, rupees per day, measures money over time. A useful example is that 1,000 people living in 10 square kilometres give a density of 100 persons per square kilometre. Exam cue: density means “how many in a given area”; for population, use persons per square kilometre.

Related tags

Population DensityUnitPersons Per Square Kilometre

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