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A plane flies at 200 knots left an airport A `(30^0S, 31^0E)` and flew due North to an airport B `(30^0N, 31^0E)`.
(a) Calculate the distance covered by the plane, in nautical miles
(b) After a 15 minutes stopover at B, the plane flew due West to an airport C `(30^0N, 13^0E)` at the same speed.
Calculate the total time taken to complete the journey from airport A to airport C,