This is math in geography!

Algebra Level 3

A group of geographers analysing the 2013 data of two cities found that the city A had a population of 250,000 habitants, and it have an area of \(1250 \text{ km}^{2}\).

The data of city B was incomplete and the only informations are that the ratio between city A population and city B population was 2:3 and the population density of city B was 100 habitants per kilometre square less than city A.

Then, the area of city B is:

Definitions: The Population Density of a city is the average number of habitants living in each kilometer square of this city.


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