Describe how Indian Standard Time has been fixed
Answers
Answer:
The "Indian Standard time (IST)" has been fixed according to the standard meridian which runs through 82 30'E. This longitude passes through the "Shankargarh Fort, Mirzapur" in "Allahabad" district and in the state of "Uttar Pradesh".
Answer:
The international convention says that longitudinal difference between two standard meridians should be a multiple of 7.5 degrees, so that time difference is always in half hours or full hours (7.5 deg * 4 min/deg = 30 minutes).To make a preliminary guess about the standard meridian of a country, take the westernmost longitude and the easternmost longitude of that country, take the mean, and find the nearest multiple of 7.5 degree. However, if the country has a large longitudinal expanse, there may be more than one time zone (and hence multiple standard meridians). Location of standard meridian can also be affected by political considerations, demographics, etc.
To make a preliminary guess about the standard meridian of a country, take the westernmost longitude and the easternmost longitude of that country, take the mean, and find the nearest multiple of 7.5 degree. However, if the country has a large longitudinal expanse, there may be more than one time zone (and hence multiple standard meridians). Location of standard meridian can also be affected by political considerations, demographics, etc.Making the first guess: India Longitudinal extent: 68° 7' 53" E to 97° 24' 47" E. Mean: 82°46'20" Nearest multiple of 7.5°: 82.5°
To make a preliminary guess about the standard meridian of a country, take the westernmost longitude and the easternmost longitude of that country, take the mean, and find the nearest multiple of 7.5 degree. However, if the country has a large longitudinal expanse, there may be more than one time zone (and hence multiple standard meridians). Location of standard meridian can also be affected by political considerations, demographics, etc.Making the first guess: India Longitudinal extent: 68° 7' 53" E to 97° 24' 47" E. Mean: 82°46'20" Nearest multiple of 7.5°: 82.5°First guess of standard meridian: 82° 30' E This is the actual standard meridian of India.Time zone: 82.5 × 4 minutes ahead of GMT = 5.5 hours ahead of GMT. Indian Standard Time is calculated on the basis of 82.5° E longitude, in Shankargarh Fort, Mirzapur in Allahabad district in the state of Uttar Pradesh which is nearly on the corresponding longitude reference line .
Explanation:
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