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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.

Respuesta :

Ckaranja
5669.71 km

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

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