Question

The population density of the world is calculated by finding the ratio of the total number of people in the world to the area of ​​land. Since the earth is about 1.5 x 108 square kilometers, approximately how many people would inhabit each square kilometer of the earth? Show the work and / or explain your reason

Answer 1

51

Explanation:

A = Surface area of the Earth =
`1.5* 10^8\ \text{km}^2`

Total number of people on Earth = 7.594 billion as of 2018 =
`7.594* 10^9`

We need to find the number of people living in each square km of land area.

So, we need to divide the number of people by the land area of the Earth.

`1.5* 10^8\ \text{km}^2=7.594* 10^9\ \text{people}`

`\Rightarrow 1\ \text{km}^2=(7.594* 10^9)/(1.5* 10^8)`

`\Rightarrow 1\ \text{km}^2=50.63\approx 51\ \text{people}`

So, 51 people will inhabit each square km of land area.