Standard Meridian is a meridian which is used to determine standard time.
The time of a place depends on the longitude that passes through it. Therefore, the standard time for each country is usually taken as the time of the central meridian that passes through it
India has a vast longitudinal extent. Since many meridians pass through india,
Then it is important to adopt the local time of one central meridian of a country as the standard time for the country.
Thus, we need a standard meridian for India..
Final Answer
We need a standard meridian for India because to adopt the local time of one central meridian of a country as the standard time for the country.
