Geography Answer the question

The following discrepancies will emerge if more than one local times, instead of one standard time are followed in a country with huge longitudinal extent:

1. It will become difficult to synchronize the timetable of rail transportation, air transportation, etc. in a country.
2. It will become difficult to synchronize the timings of schools, colleges, banks, libraries, etc. in a country.
3. We will always have to adjust the time in watch as we move from one place to another in a country.

The places lying on the same longitude have the same local time. Therefore, a country having a large latitudinal extent have only one standard time.

From the given countries, only one time exists in Sri Lanka, New Zealand and China.

In present times, the instruments like watches, calendars, etc. are used for time measurement.

In olden days, the time was measured with the help of the natural events of sunrise and sunset and the instruments like Ghatikapaatra, sand timer, etc.

The date changes at 1800 longitude.

While the earth rotates, 360 longitudes face the sun daily.

The direction of the rotation of the earth is from west to east.

The apparent movement of the sun from east to west is a result of the rotation of the earth from west to east.

360 longitudes can be drawn on a world map keeping an interval of 10 each.

The duration of day and night keeps changing as the earth is tilted at an angle of 23.5 degrees.

It would be 12 noon at Prime Meridian when a new day starts at 180° longitude.

When it is 9 a.m. in India, it would be 10 p.m. of the previous day at 82°30′ W longitude.

When it is 2 p.m. in India, it would be 2 p.m. exactly in Sri Lanka.

If it is 8 a.m. in India, it would be 2.30 a.m. in Greenwich.

When the sun is directly overhead at a particular place, it is considered as noon at that place and that time is considered as a local time of that place.

The earth takes nearly 24 hours to complete one rotation.

(1) The maximum number of local times that can be there in the world is 360.
(2) 15 longitudes pass the sun in one hour.