Arrange the countries in order of increasing population density (number of people per sq. kms).
Explanation:
Population density = population (in millions)/surface area (in ‘000s sq.km)
Find this value for each country in the options. Observe that there are only four countries – Estonia, Kyrgyz Republic, Lao PDR and Latvia - in the options.
Also, among these, Estonia has been given as the lowest value for each option.
Hence, it need not be calculated.
Kyrgyz Republic: (6.5 × 106)/ (200 × 103)
= 32.5
Lao PDR: (7 × 106)/ (237 × 103) = 29.54
Latvia: (2 × 106)/ (65 × 103) = 30.77
Hence, the correct ascending order is: Estonia, Lao PDR, Latvia, Kyrgyz Republic
Hence, option (d).
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