What is the approximate distance between Portland, Oregon
(45° north, 122° west), and San Francisco, California (37° north, 122° west). Use 3,960 miles for the radius of Earth.
Working The two cities are located on the same longitude. The formula for the distance then is; Distance = [tex] \frac{∅}{360} [/tex]*2*π*3960 where ∅ is the latitude difference-add the latitudes as they are on different sides. Distance = [tex] \frac{82}{360} [/tex]*2*[tex] \frac{22}{7} [/tex]*3960 =5669.71 km
