The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is
A. 5100 nautical miles
B. 5700 nautical miles
C. 120 nautical miles
D. 500 nautical miles
Answer: Option B
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Distance of longitudes at a specific latitude = Total longitude difference * one longitude equivalent miles on the equator i.e. 60 * Cos(latitude).
= (93+97)*60 miles* Cos(60) = 5700.
Please explain