Q1. What is the standard meridian of India, used to determine Indian Standard Time (IST)?
- (a) 82°30' E
- (b) 80°30' E
- (c) 78°30' E
- (d) 84°30' E
Answer & solution
Answer: (a) 82°30' E
The standard meridian of India is 82°30' East longitude, which passes through Mirzapur (Uttar Pradesh). Indian Standard Time (IST) is UTC+5:30, which is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT). The meridian 82°30'E was chosen as it passes approximately through the center of India.
(b) 80°30' E: This is not the standard meridian of India; 80°E roughly passes through Chennai.
(c) 78°30' E: Not the standard meridian; this roughly passes through areas west of Chennai.
(d) 84°30' E: Not the standard meridian; this passes through parts of Odisha and Jharkhand.