Question

Standard time is needed for every country .why?

Answer 1

Answer:

The time of a place depends on the longitude that passes through it. Therefore, the standard time for each country is usually taken as the time of the central meridian that passes through it. ... Thus, we need a standard meridian for the country. In India 82 ½ °E longitude determines the standard time.

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Answer 2

Answer:

The Earth has been divided into 24 time zones of one hour each. Each of these zones covers 15 degrees of longitude.

As the local time differs by 4 minutes at every longitude, it would create a lot of confusion regarding time for any country as a whole which may stretch across several longitudes. Therefore each country selects a central meridian and the local time of this meridian is the standard time of that country.

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