In the Southern Hemisphere the summer solstice is on December 21st. Imagine 2 towns at roughly the same longitude, town 1 is directly north of town 2 at latitude of about 22.3° S. If a stick casts no shadow at noon on December 21 in town 1, and the distance between town 1 and town 2 was found to be 7500 stadia (1387.5 km) find the size of Earth. (Understanding Eratosthenes’ method)

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