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What is the difference between the Indian Standard time and Greenwich Standard Time?

  • A.5 Hour
  • B.15 Hour and 30 minutes
  • C.5 Hour and 30 minutes
  • D.6 Hour and 30 minutes

Answer: C

The difference is 5 hours 30 minutes.

Indian Standard Time is fixed by the 82°30′E meridian, and the earth turns 15° an hour, so \[\frac{82.5}{15} = 5.5\ \text{hours}\] The odd half hour follows from the choice of that meridian, roughly through the middle of a country spanning nearly 30 degrees of longitude.

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