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Find the distance between points A (50'S, 25 E) and B (50'S, 140E) in: (a) km. (b) nm. (Take the radius of the earth

Find the distance between points A (50'S, 25 E) and B (50'S, 140E) in: (a) km. (b) nm. (Take the radius of the earth to be 6 370 km and 7-23)

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