Question

A township is in the shape of a rectangle that is 5 km long and 4 km wide. There are 2000 residents in the township. What is the population density of the township?

Answer 1

100

Explanation:

Answer 2

100 residents/
`km^2`

Explanation:

In order to find the population density, we have to calculate the area of the township first.

We know that:

L = length = 5 km

W = width = 4 km

So the area of the township is

`A=L\cdot W = 5 \cdot 4 = 20 km^2`

Now we can find the population density by using

`d=(N)/(A)`

where N is the number of residents, and A is the area.

Substituting N = 2000, we find:

`d=(2000)/(20)=100 res./km^2`

so, 100 residents per kilometer squared.