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How

did Eratosthenes calculate two cities to find the circumference of
earth.
if there is anyway of making the answer short please do.

1 Answer

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Eratosthenes sent a man to Syene from Alexandria on foot to measure the distance between Alexandria and Syene. Thus, Eratosthenes measured the distance between the two cities is 800 km. He multiplied by 800 km to 50 and calculated that the Earth's circumference is 40,000 km.

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