You have received an invitation to work during the holidays on expeditions. The first expedition will work at the North Pole and observe ice drift. The second will monitor the precipitation regime at the equator. Which expedition will be closer to the center of the Earth and by how much?
Equatorial radius = 6378, 245 km
Polar radius = 6356, 863 km
6378, 245 km – 6356, 863 km = 21, 382 km
Answer: the expedition working at the North Pole will be 21, 382 km closer to the center of the Earth than the expedition at the equator.
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