Who calculated the actual circumference of the earth in 3rd century CE?

Ptolemy

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Plato

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Aristotle

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Eratosthenes

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Solution

The correct option is D Eratosthenes
Eratosthenes calculated the actual circumference of the earth in the 3rd century CE. He was a Greek scientific writer, astronomer, and poet. His work is comparable to what is now known as the study of geography, and he introduced some of the terminology still used today.

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