Question

The population density of Iceland, in people per square kilometer of land area, increased from 2.5 in 1990 to

3.3 in 2014. During this time period, the land area of Iceland was 100,250 square kilometers. By how many
people did Iceland's population increase from 1990 to 2014?
A 330,825
B 132,330
C 125,312
D 80,200

Answer 1

Given:

The population density of Iceland, in people per square kilometer of land area, increased from 2.5 in 1990 to 3.3 in 2014.

Land area of Iceland = 100,250 square kilometers.

To find:

The Iceland's population increase from 1990 to 2014.

Solution:

Land area of Iceland is constant, i.e., 100,250 square kilometers.

The population density of Iceland, in people per square kilometer of land area in 1990 is 2.5. So, the population in 1990 is

`2.5* 100,250=250,625`

population density of Iceland, in people per square kilometer of land area in 2014 is 3.3. So, the population in 2014 is

`3.3* 100,250=330,825`

The Iceland's population increase from 1990 to 2014 is

`330,825-250,625=80,200`

Therefore, the correct option is D.