The correct answer is 82°30'N.
- The standard meridian of India
- The Indian Government has accepted the meridian of 82.5° east for the standard time which is 5 hours 30 mins, ahead of Greenwich Mean Time.
- The standard meridian of India passes through the following states:
- Uttar Pradesh
- Madhya Pradesh
- Andhra Pradesh
- Standard time is referred to as the synchronization of clocks within a certain geographical area to a single standard time, instead of using solar time or a locally chosen meridian (longitude) to establish a local mean time standard.
- The Standard Meridian of India having the longitude 82°30’E, which passes through Mirzapur in Uttar Pradesh is considered as the standard time for the whole country.
- There is a general understanding among the countries of the world to select the standard meridian in multiples of 7°30' of longitude.
- That is why 82°30' E has been selected as the ‘standard meridian’ of India.
- Indian Standard Time is ahead of Greenwich Mean Time by 5 hours and 30 minutes.
- In India, we find a difference of about 1 hour and 45 minutes in the local times of Dwarka in Gujarat and Dibrugarh in Assam.
- There are some countries where there is more than one standard meridian due to their vast east-to-west extent. For example, the USA has seven time zones.