Which Indian mathematician and astronomer wrote that Earth was a rotating sphere?

Eratosthenes is a GREEK not a Indian mathematician who decided that Earth was a Sphere

Explanation:

I believe Aryabhata

Explanation:

Not sure but I think so

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.