The Earth has been divided into many time zones. How many degrees does each time zone covers?

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SSC CHSL Tier-I Exam 2022 Official Paper (Held On: 16 March, 2023 Shift 3)
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  1. 24 degrees
  2. 20 degrees
  3. 15 degrees
  4. 10 degrees

Answer (Detailed Solution Below)

Option 3 : 15 degrees
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SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 02 Aug 2023 Shift 1)
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Detailed Solution

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The correct answer is 15 degrees.

Key Points

  • Each time zone covers 15 degrees of longitude.
  • There are 24 time zones in the world, so the Earth is divided into 360/24 = 15 degrees of longitude per time zone.
    • 24 degrees is the total number of degrees in a circle.
    • 20 degrees is not a common number of degrees for a time zone,.
    • 10 degrees is to Indian Standard Time o small to be a useful division of the Earth.
Important Points
  • India uses a single time zone, Indian Standard Time (IST), which is UTC+5:30.
  • This means that IST is 5 and a half hours ahead of Coordinated Universal Time (UTC).

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