Geography PYQ 7 of 587 · Introduction, Area, Extent & Standard Time · Standard Time

How much is the difference between Indian Standard Time (I.S.T.) and Greenwich Mean Time (G.M.T.)?

  1. A+ 4½ hours
  2. B+ 5½ hours
  3. C– 5½ hours
  4. D– 4½ hours

45th B.P.S.C. (Pre) 2001

Show answer and explanation

Correct answer: (b) + 5½ hours

Explanation

Indian Standard Time is 5½ hours (5 hours 30 minutes) ahead of Greenwich Mean Time. In India, 82.5° East longitude is considered the standard meridian. The local time of this meridian is accepted as the standard time for the entire country. The Prime Meridian is 0° and is known as the Greenwich Meridian.

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