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If an area has a density of 1,000 persons per square kilometre, what is the correct meaning?

Answer and explanation

Correct answer: On average, there are 1,000 people in each square kilometre

Correct answer: A. Population density tells us how many people live, on average, in a unit of area. The formula is density = total population ÷ total area. Therefore, 1,000 persons per square kilometre means that the average number of people is 1,000 for every square kilometre. The word “average” matters: the people may not be spread evenly, because some parts can be more crowded and others less crowded. B is wrong because 1,000 is a rate per square kilometre, not necessarily the total population. If the area were 5 square kilometres at the same average density, its population would be about 5,000. C reverses the relationship and gives the wrong unit. D is wrong because the density value does not itself tell us the total area. Memory cue: density = people ÷ area; always read the unit.

Related tags

Population DensityAveragePersons Per Square KilometreFormulaPopulationGeographyClass 9 Mcq

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