157.5 m, his measurement turns out to be 39,690 km, an error of less than 1%. [6] http://en.wikipedia.org/wiki/Eratosthenes   257 BC–c. 185 BC/180 BC Aristophanes ( Greek : Ἀριστοφάνης ) of Byzantium (c. 257 BC–c. 185 BC/180 BC) was a Greek scholar , critic and grammarian , particularly renowned for his work