Question

why there is 2 hrs time lag between arunachal pradesh and gujarat

Answer 1

heyyy!!!!

The local times which lie on different meridians are bound to differ.

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.

The local time at this Meridian has been accepted as the Indian Standard Time (IST) throughout the country because it passes through the middle of the country.

It has helped to avoid a lot of confusion which would have been there by following different local times or in absence of a uniform time. 

hope it helps uhh

Answer 2

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The reason for time difference between Gujarat and Arunachal Pradesh is of 2 hours as they both lie on different longitudes. The time along the Central Meridian of India i.e. 82 32' E passing through Mirzapur (in Uttar Pradesh) is taken as the standard time for the whole country.