Distance between Hanoi, Vietnam and Muang Xay, Laos
403 km = 250 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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Hanoi, Vietnam
Country: VietnamHanoi’s coordinates: 21°01′28″ N, 105°50′28″ E
Population: 1,431,270
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Wikipedia article: Hanoi
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Muang Xay, Laos
Country: LaosMuang Xay’s coordinates: 20°41′32″ N, 101°59′01″ E
Population: 25,000
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Wikipedia article: Muang Xay
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