There is a monocentric town that is shaped in a circle. The yearly rent for land in the CBD there is $36,000 per dunam. The value of the agricultural land on the outskirts of the town is $1,500 per dunam. The cost to travel in the town is $310 per kilometer (round trip).
The crowdedness of the town is:
in the CBD: an average of 10 households for each dunam
on the outskirts of town: an average of 3 households for each dunam
How far - in kilometers - does the town spread?