Question

what is meant by indian standard time ? why do we need a standard meridian of india?

Answer 1

Indian standard time is the regular time determined by the Standard Meridian of India.

The stretch of India is extensive. around 30 degrees are crossing from westernmost state to easternmost state Arunachal Pradesh. This creates a problem of two different zones, therefore, to avoid this chaos and maintain the time uniformity inside the country, it requires to follow a standard time. Accordingly, India has taken 82 ½ ° E longitude as its Standard Meridian.