Question

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

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

$2.5\times 100,250=250,625$

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

$3.3\times 100,250=330,825$

The Iceland's population increase from 1990 to 2014 is

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

Therefore, the correct option is D.