JAMB Economics 2018 Paper

Concept:Population density measures how many people live in one unit area of land.Explanation:Population density is calculated by dividing the total population by the total land area.Total population $= 100$ million $= 100{,}000{,}000$ people.Total land area $= 50$ square kilometres.Population density $= \frac{\text{Total population}}{\text{Total land area}}$Population density $= \frac{100{,}000{,}000}{50} = 2{,}000{,}000$ people per square kilometre.Therefore, population density $= 2$ million people per square kilometre.Answer:B. 2 million people per square kilometre.