how does the local time was changed
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1. The longitudinal difference between eastern longitude and western longitude is 30°
2. For every longitude the sun takes 4 minutes to cross each longitude from east to west.
1 = 4 minutes
30° = 4 minutes × 30
= 120 minutes
= 2 hours
3. The sun takes 2 hours to reach from Arunachal Pradesh to Gujrat but the watch shows the same time across the country because of the standard meridian of India which is selected at 82°30'E which overcomes the 2 hours lag and avoids the confusion in local time across the country.
2. For every longitude the sun takes 4 minutes to cross each longitude from east to west.
1 = 4 minutes
30° = 4 minutes × 30
= 120 minutes
= 2 hours
3. The sun takes 2 hours to reach from Arunachal Pradesh to Gujrat but the watch shows the same time across the country because of the standard meridian of India which is selected at 82°30'E which overcomes the 2 hours lag and avoids the confusion in local time across the country.
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