Question

Why is 82° 30' East longitude chosen as the standard meridian of India?

Answer 1

1) the earth in its rotation covers 15 degrees of longitude in 1 hour so the places located at different longitude have different local time.
2) in order to have a uniform system finding time world has been divided into 24 time zones. each meridian must e in the multiple 15 degree and 7.5 degree.
3) since 82.5 degrees is the central longitude of India it has been selected as the central meridian

Answer 2

Answer:

From Gujarat to Arunachal Pradesh there is a time lag of two hours. Hence, time along the Standard Meridian of India (82° 30' E) passing through Mirzapur (in Uttar Pradesh) is taken as the standard time for the whole country.