Question

Standard the standard time of India has been decided by the l ocal time at 82.5 degree East longitude

Answer 1

The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat.

This causes a time lag of two hours from Gujarat to Arunachal Pradesh to avoid confusion and to have a standard time for reference, The 82.30'Eastern Longitude has been taken as the standard time for the whole country.