A piece of land in Ottawa with an area of 0.4 square kilometers is priced at 5600 Canadian dollars. If there are 1.358 Canadian dollars per (U.S.) dollar, then what is the price in dollars per square mile?

Answer 1

When doing conversions, it is easier if you include the units.

C$5600/km²
=5600C$ * (1US$/1.358C$) / (0.6214mile)²
= 4123.71 US$ / 0.3861 mi²
= US$10,679.37 mi^-2

Note: the book is probably old. The exchange rate today is 1.04C$=1US$.