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NDA 2020 GAT · General Knowledge · Physical Geography · medium

Indian Standard Time (IST): 1. It is based on the 82.5 degree east longitude passing near Mirzapur. 2. It is six hours ahead of Greenwich Mean Time.

Single correct option

Consider the following statements about Indian Standard Time (IST):
1. It is based on the 82.5 degree east longitude passing near Mirzapur.
2. It is six hours ahead of Greenwich Mean Time.
Which of the statements given above is/are correct?
  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2
Show answer and solution

Answer: (A) 1 only

Only statement 1 is correct. IST is calculated from 82 degrees 30 minutes east, which passes near Mirzapur in Uttar Pradesh. Since the Earth rotates 15 degrees per hour, 82.5 degrees gives 5 hours 30 minutes ahead of GMT, not six hours, so statement 2 is wrong.
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Original question written in the NDA 2020 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake