PDE Q22
0. The difference between the Indian Standard Time and the Greenwich mean Time is:
- Option : D
- Explanation :
The Indian Standard Time (IST) is 5½ hours ahead of Greenwich Mean Time (GMT).
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IST is calculated based on the 82.5° E longitude, which passes near Mirzapur, Uttar Pradesh.
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GMT is based on the Prime Meridian (0° longitude) in Greenwich, London.
So:
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When it’s 12:00 noon GMT, it’s 5:30 PM IST.
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The time difference is +5 hours 30 minutes, not a round figure like 3 or 3¼.
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Option A: -3½ hours – Incorrect. India is ahead of GMT, not behind.
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Option B: +3½ hours – Incorrect. Too little; actual difference is 5½.
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Option C: -3¼ hours – Incorrect and imprecise; India is not behind GMT.
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Option D: +5½ hours – Correct. This is the official time difference between IST and GMT.
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