Question

The difference between Green with Time and Indian Standard Time is__________.
A. 5hours
B. 5 ½ hours
C. 6 hours
D. 6 ½ hours

Answer 1

Hint: The time of the whole world is in reference to the Greenwich meridian in London. India is towards the east of the Greenwich Meridian.

Complete answer: Indian Standard Time is 5 hours and 30 minutes ahead of Greenwich, London, UK. The prime meridian is considered to be an imaginary reference life on the basis of which charts and maps are made. It is also used as a reference point for the time of a country.
As the prime meridian, the north-south line at Greenwich is utilized as the reference for all different meridians of longitude, which are numbered east or west of it. The Greenwich meridian fills in as the reason for the world's standard time region framework. The mean sun oriented time at Greenwich is presently called Universal Time and was earlier called Greenwich Mean Time.
Indian Standard Time is calculated on the basis of 82.5°E longitude in the city of Mirzapur, Uttar Pradesh, which is situated approximately on the corresponding longitude reference line.

Hence, option B is the right answer.

Note: After Independence in 1947, the Union government set up IST as the official time for the entire nation, in spite of the fact that Kolkata and Mumbai held their own neighborhood time (known as Calcutta Time and Bombay Time) until 1948 and 1955, respectively. The Central observatory was moved from Chennai to an area at Shankargarh Fort in Prayagraj locale, so it would be as near UTC+05:30 as could be expected under the circumstances.