Question

if every state follows it's time then what problems would rise​

Answer 1

Apart from simple confusion within states, multiple time zones will unnecessarily increases costs associated with multiple time zones including TV programs, National Schedules, Airports and Trains which will need to heavily invest in upgrading all their systems to meet the new regulations for every State.

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Answer 2

• There would have been great confusion in railways and other time -based communications are concerned.
• Suppose you have to enter your school at 11:00 am. With your school following your own local time.

the time will alter and cause great problems.