Question

A simple monocentric city (Roundville) has a population of 3,000,000 with a homogeneous density of 5 inhabitants per acre, and one person per household. Agricultural rents are $500/acre/yr, housing construction costs (including developer profit) can be paid for with a perpetual loan charging interest of $5000/house/yr, and transportation costs are $250/person/yr per mile of distance from the center of the city. (Recall that there are 640 acres per Mi2.)
If Roundville's population increases by 10% but its density remains constant, approximately how much will its radius increase?
(a) None.
(b) 5%.
(c) 10%.
(d) 20%.

Answer

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