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The Equatorial Radius of the Earth is 6378.2 Kilometre. The Circumference of the Earth is therefore 'Pi' times the Diameter which is 3.142 X 6378.2 X 2 which is 40,080.6 Km The rough ANSWER is 40,080 Kilometre. Source of information is J.B.CLARKE CBE,MA, LLD Great Britain The length of a Longitude is different, but it was used by a French Scientist , Charles Marie de La Condamine to choose the Standard of length called a METRE. A Metre is the Longitude of the Earth, divided by 40 million. This measure was officially adopted in the year 1791 (30th March)

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12y ago

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