Why does the local time vary from one meridian to another?
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due to the rotation of the earth the sunrays fall on different places in different times
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Importance of Standard Time
In India, the longitude of 82 ° E (82° 30' E) is treated as the standard meridian and the local time at this meridian is considered as the standard time for the whole country. It is known as the Indian Standard Time (IST
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