Previous Year Question
The Standard Meridian of India is:
A.
82°30′ E Longitude
B.
83°30′ E Longitude
C.
82° E Longitude
D.
82°50′ E Longitude
Correct Answer: A
Detailed Solution
The Standard Meridian of India is 82°30′ East longitude. The local time along this longitude forms the basis of Indian Standard Time (IST) for the entire country.
The Earth rotates through 360° in 24 hours, so a difference of 15° in longitude corresponds to approximately one hour of time. The time at 82°30′ E is 5 hours 30 minutes ahead of the Greenwich meridian; hence IST is expressed as GMT/UTC +5:30.