Question

The local time difference between Gujarat and Arunachal Pradesh is _____________

A. 2 hours

B. 1 hour

C. 3 hours

D. No difference

Answer 1

Hint: The time zone observed in India is the Indian Standard Time (IST) It does not depend on daylight or seasonal changes. The difference in longitude between Gujarat and Arunachal Pradesh is 30 degrees.

Complete Step by Step answer: There is a difference of two hours in the Local time between Gujarat and Arunachal Pradesh. This is because there is a 30-degree difference between India’s extreme east (Arunachal Pradesh) and extreme west (Gujarat). Therefore using the formula, 1 degree is equal to 4 mins, hence 30 degrees is equal to 120 minutes which is 2 hours. Hence when the sunrise is 6 am in Arunachal Pradesh, Gujarat is 2 hours behind, which means the sunrise is 8 am there.

The Central Government, after the independence of India in 1947, established the IST for the whole country. Although cities like Kolkata and Bombay maintained their own local time till 1948 and 1955. The Tropic of Cancer crosses India and divides the country into two parts. The Standard Meridian of India is 82°30'E. It crosses through Mirzapur in Uttar Pradesh.

The distance between the country’s east and west is 2,933 kilometers. This is why the sun rises and sets 2 hours earlier in the eastern side of India. The IST is coordinated with the Greenwich Mean Time.
Hence the correct option is (A). 2 hours.

Note: Even though the entire country follows the time zone called the IST, while writing the answer, do not get confused between IST and write that Gujarat and Arunachal Pradesh have the same timing. Note carefully the difference in longitude between them, which causes the change in time between these two states.