Question

why is 82 and half degree considered as the Standard Meridian of India

Answer 1

The Standard Meridian Of India (82°30'E) which passes Through Mirzapur in Uttar Pradesh is taken as Standard Meridian because it Passes Almost through the Centre of the Country.

Answer 2

HEY, HERE IS YOUR ANSWER

As the local time differs by 4 minutes at every longitude, it would create a lot of confusion regarding time for a country.

So, each country selects a central meridian and the local time of this meridian is the standard time of that particular country.

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

In India, the sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat.  

This causes a time lag of 2 hours from Gujarat to Arunachal Pradesh and to avoid confusion and to have a standard time for reference. The 82.30' 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.

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

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