Question 3 - Past Year Questions - 3 Marks - Chapter 1 Class 9 Geography - India-Size And Location - Geography

Explain the major reasons for the two hours  time difference in local time between Arunachal  Pradesh and Gujarat.

Answer :

-lock-

Points to remember :

• There is a time lag of 2 hours between Gujarat and Arunachal Pradesh. 
• Gujarat is the westernmost tip, Arunachal pradesh is the easternmost point. Their difference extend in longitudes is 30°. 
• Earth takes 4 minutes to travel 1° of  longitude.

Answer to be written in exam :

Reasons for the 2 hours time lag between Gujarat and Arunachal Pradesh :

1.   Arunachal Pradesh lies on the easternmost tip  of the country and Gujarat lies on the westernmost tip.
2.   The longitudinal difference between the two  points [Arunachal Pradesh and Gujarat] is of 30°.  
3.  If the Earth take 4 minutes to travel 1° of  longitude, it would take 30°× 4 = 120 min. or 2  hours to cross the distance between Arunachal  Pradesh and Gujarat.

 Thus, their time difference  in local time is 2 hours. In order to ensure  uniformity in time, IST or Indian Standard time  is followed.

-endlock-