How Did Eratosthenes Estimate the Size of Earth in 240

question 86

Multiple Choice

How did Eratosthenes estimate the size of Earth in 240 B.C.?

• A)by observing the duration of a solar eclipse
• B)by measuring the size of Earth's shadow on the Moon in a lunar eclipse
• C)by comparing the maximum altitude of the Sun in two cities at different latitudes on the summer solstice
• D)by sending fleets of ships around Earth
• E)We don't know how he did it since all his writings were destroyed.

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