JAMB Geography 2020 Paper

Concept:Population density measures how many persons live in one square kilometre of an area.Explanation:Population density is calculated by dividing the total population by the land area.For country Y, the total population is $10,000,000$ persons and the land area is $200,000\, \mathrm{km}^2$.Formula:$$\text{Population density} = \frac{\text{Total population}}{\text{Land area}}$$Substitute the given values:$$\text{Population density} = \frac{10{,}000{,}000 \text{ persons}}{200{,}000\, \mathrm{km}^2}$$Simplify the fraction:$$\text{Population density} = 50 \text{ persons per } \mathrm{km}^2$$Hence, country Y has a population density of $50$ persons per square kilometre.Answer:A. 50 persons per km$^{2}$