Estimation quiz!
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08-03-2020, 03:10 PM
Post: #42
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RE: Estimation quiz!
(08-03-2020 07:56 AM)EdS2 Wrote: Excellent - so 23 is a solid answer, and Valentin's estimate of 23 is spot-on. Valentin, that's a very good estimate indeed, and I'd love to know how you approached it. Quite simple, actually. As I explained above, 13 spheres of unit diameter will exactly fit into a larger sphere of diameter 3. Now, Earth's mean radius is ~6371.0 km, while the Moon's is ~1737.4 km. Thus, the expected number of spheres is just a matter of scaling, namely: #Moons_within_hollow_Earth = INT(((6371.0 / 1737.4) / 3)^3 * 13) = 23 Regards. V. All My Articles & other Materials here: Valentin Albillo's HP Collection |
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