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what is meant by indian standard time?why do we need a standard meridian for india . explain

The longutdinal extent of India is 30 degrees. The Sun takes 4 minutes to travel the distance between every degree of longitude. So, it takes 2 hours for the Sun to rise in Gujarat after it has risen in Arunachal Pradesh. This gives rise to confusion regarding the local time. To avoid confusion, and to have one standard time for the country, the standard meridian is chosen along 82degrees 50'E.

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the indian standard meridian of india is (82'30'E) longitude, passing through mirzapur in uttar pradesh.we need this meridian so that there will be same time everywhere in india .

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 u are having some other answer

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 why do we need standard merdian  for india ?explain

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Meridian which is passing through centre of the country or on which prominent cities are located is known as the standard meridian of that country

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even though there is a time lag , a fixed time is taken along a meridian . this is called std time

we need a std time :
                             to avoid confusions regarding time
                             to have a fixed time
                             
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