2007-03-17 07:58:52 · 3 answers · asked by farshad95 1 in Science & Mathematics ➔ Earth Sciences & Geology
Since the Earth, like all planets, is not a perfect sphere, the radius of Earth can refer to various values. The radius of the Earth at a point on the surface is the distance from the center of the Earth to the mean sea level at that point. This value varies from about 6,356.750 km (the polar radius) to about 6,378.135 km (the equatorial radius). The radius of the Earth can also refer to other fixed radii as well as to various mean radii, outlined below. For all planets the sources of the variation from spherical are rotation, variation of mass density within the planet, and tidal forces.
2007-03-17 12:24:33 · answer #1 · answered by ђermiona 6 · 0⤊ 0⤋
6378.15 km
The diameter of the Earth is 12,763.3 km, so the radius of this is that divided by two, which is 6378.15 km.
2007-03-17 15:08:18 · answer #2 · answered by tk_pinna 2 · 0⤊ 0⤋
6500 kms
2007-03-17 15:06:43 · answer #3 · answered by harshveer 2 · 0⤊ 1⤋