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India–Size and Location — Social Studies STD 9 — Question

CBSE BoardEnglish MediumSTD 9Social StudiesIndia–Size and Location5 Marks
Question
Why 82°30′ E has been as the standard meridian of India?
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Answer

82°30′ E meridian has been selected as the standard meridian of India for the following reasons:
  1. This is a general understanding among the countries of the world to select a Standard Meridian in multiples of 7°30′ east and west of Prime Meridian. It is equal to half an hour.
  2. A country’s standard time is derived from such a central meridian. The minimum difference of time between two consecutive standard meridians should be half an hour.
  3. From Gujarat to Arunachal Pradesh, there is a time lag of two hours. Hence, time along the standard meridian of India (82°30′E) passing through Mirzapur (U.P.) is taken as the standard time for the whole country.

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