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A district of 250 square kilometres holds 90,000 people. What is its population density?

  • A.3,600 per square kilometre
  • B.278 per square kilometre
  • C.360 per square kilometre
  • D.36 per square kilometre

Answer: C

Dividing 90,000 by 250 gives 360 people for each square kilometre. Density is the standard normalisation for population because it removes the effect of the unit's size on the comparison, letting a small crowded district be set against a large empty one.

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