Question

Although the time of sunrise varies between Arunachal Pradesh and New Delhi, the watches show the same time, Explain why.

Answer 1

• India has only one time zone, called Indian Standard Time (IST).
• IST is based on 82°30' E longitude (the Standard Meridian of India).
• Arunachal Pradesh is in the east and sees sunrise earlier than New Delhi, but both places follow the same time on the clock (IST).

That’s why, even though the sunrise is earlier in Arunachal Pradesh, the watches show the same time everywhere in India.