Question

the reason for calculating international time different from Greenwich is​

Answer 1

Explanation:

Each of these longitudes is called a degree. The 0 degree longitude passing through Greenwich, near London, is considered as standard and the time of all other time zones are calculated accordingly. ... So the time difference between Greenwich and India is 82.5 x 4, which is 330 minutes (5 hours 30 minutes).

Answer 2

greenwich timeline was too old because at that in history britishers

were advanced as the time come above then we start taking standard meridian but in some countries greenwich time period is followed

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