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The diameter of Earth is 12,742 kilometers; the diameter of the moon is 3476 kilometers.
a. If you flew around Earth by following the equator at a height of 10 kilometers, how many trips around the Moon could you take in the same amount of time, at the same height from the Moon and a t the same speed? Explain

b. The circle whose circumference is the equator is sometime call the ?great circle? of Earth or of the Moon. Use a ratio to compare the areas of the great circles of Earth and the Moon.

  • geometry -

    trip around earth is pi*(12742+10) = 40061 km

    trip around moon is pi * (2476+10) = 7810 km

    so, what's 40061/7810?

    b. ratio of great circles is the same as the ratio of the radii, since C = 2pi*r

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