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In which situation is it easier to compare population density?

Answer and explanation

Correct answer: When both areas use persons per square kilometre unit

The direct answer is A: both areas should use persons per square kilometre. Population density means the number of people living in a unit of area, commonly written as persons per square kilometre. Step by step: find each area’s population; find its area in square kilometres; calculate population divided by area; compare the resulting values. A is correct because a common unit makes the comparison fair and meaningful. B is wrong because people’s names do not measure density. C is wrong because hiding area prevents calculation and comparison. D is wrong because a colour may display data, but replacing population with colour does not create a comparable numerical unit; the map key would still be needed. Exam cue: check both the formula and the unit before comparing.

Related tags

Density ComparisonCommon UnitPer Square Kilometre

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