Question

the sun rises two houre earlier in arunachal pradesh as compared to gujarat in the West but the watch show the same time.how does this happen?

Answer 1

because of standard meridian, which shows a central time for whole the country.
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Answer 2

This is because of different longitude.

Arunachal Pradesh and Gujrat are located at a different longitudes. Each Longitudes has different kind of Time. The standard meridian of India pass away through Mirzapur.

Arunachal Pradesh is not a part of Indian meridian which passes through Mirzapur. While, Gujrat is located at a different Standard meridian.

=> Gujarat lies between 68° E and 74° E longitude.

=> Arunachal Pradesh is located between 91.20° E and 97.30° E longitude

Also, Arunachal Pradesh is located at Eastern part of India. It means that, there will be very Huge distance in time.

Reason for time difference:

1) India is located at 30° longitude.

2) There are 30° longitudes between Arunachal pradesh and Gujarat.

3) 30°* 4mins=120 mins

4) 120 Mins is equal to 2 Hours.

So, There is a 2 hours time different between Gujrat and Arunachal Pradesh.