Real Estate Management

A four-sided town measures 1100 feet on one side and 1000 feet on the other side, on one edge 600 and on the other edge 600.  I want to cover it with roofs of houses, each of which is to be 40 feet long and 30 feet wide.  How many dwellings can I make there?

Alcuin of York ca 800

Click here to reveal the answer