How old was eratosthenes when he died

Eratosthenes had heard that on the summer solstice, at exactly noon in the town of Syene, a stick cast no shadow, and one could see the reflection of the sun in the bottom of a well. This meant that the sun was directly overhead at this time. Eratosthenes knew that the sun was never directly overhead where he lived in Alexandria. He also knew that Syene was due south of Alexandria. He realized that if he knew the distance between the cities and the anglular distance between overhead and the sun in Alexandria on the summer solstice, he could easily find the size of the e

When did eratosthenes die

When was eratosthenes born and died

Eratosthenes full name