Distance between Patna, India and Langfang, China
3318 km = 2061 miles
We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.
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Patna, India
Country: IndiaPatna’s coordinates: 25°35′38″ N, 85°08′08″ E
Population: 1,599,920
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Langfang, China
Country: ChinaLangfang’s coordinates: 39°30′34″ N, 116°41′40″ E
Population: 720,119
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