Question

If the usual rule of calculation of time were applied for the extremes of Gujarat and Arunachal Pradesh, then approximately time:
A. at Gujarat would be ahead of that at Arunachal Pradesh by about 3 hours.
B. at Gujarat would be ahead of that at Arunachal Pradesh by about 2 hours.
C. at Arunachal Pradesh would be ahead of that of Gujarat by about 3 hours.
D at Arunachal Pradesh would be ahead of that at Gujarat by about 2 hours.

Answer 1

Hint:There is a time lag between Gujarat and Arunachal Pradesh because of the longitudinal extent of India.Time along the Standard Meridian of India that is 82 degree 30'E passing through Mirzapur in Uttar Pradesh is taken as the standard time for the whole country.

Complete answer:
There is a time lag of almost two hours from Gujarat to Arunachal Pradesh because of the longitudinal extent of India. Gujarat is situated in the extreme west of India and Arunachal Pradesh is situated in the extreme east of India. The sun rises two hours earlier in Arunachal Pradesh than Gujarat.

So let us discuss why there is a time difference between Gujarat and Arunachal Pradesh:
So For every one degree, there is a time gap of 4 minutes. Hence, the difference between Gujarat and Arunachal Pradesh is 30 degrees so there will be a time gap of 30*4= 120 minutes or we can also say 2 hours. Thus, there is a time gap of two hours between Gujarat and Arunachal Pradesh.

Why is Mirzapur taken as Standard Meridian?
The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat this causes a time lag of two hours so to avoid confusion and to have a standard time along the meridian passing through Mirzapur has been taken as the standard time for our country India.

Hence, the correct answer is option (D).

Note:Let us know the states from where the Standard Meridian of India Passes:
In total, the Standard Meridian of India passes through five states; those states are: Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Orissa, and Andhra Pradesh.