Question

What is the importance of ist

Answer 1

the full form of ist is Indian standard time which helps us to identify the time if India.

Answer 2

IST = Indian Standard Time 
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The IST means the current time of India 

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Importance 

:- 

1) It helps if we don't have to know the accurate time of us then we can know it by using The IST 

2) In airports and Railway stations, only the IST time is used, This should also help us. 

3) correct time: if someone said that what is the current time of the other countries like Sri Lanka then we can say them this can we know by the increasing the 16 minutes to IST