Question

If it is 12 noon at 60 degree east longitude then explain what would be the time at 30 degree west longitude

Answer 1

The earth is one of the nine planets that make up our solar system. Though it isn't one of the largest planets, it still has a circumference of 25,000 miles or 40,000 kilometers. It is also constantly in motion. In fact, the Earth orbits the sun at an incredible 66,500 rate of miles an hour. Yet, it still takes the earth 365 days, or one year, to complete a full rotation around the sun. Moreover, as the Earth orbits the sun, it spins on its axis in a counter-clock wise motion. It too rotates at a fast pace of 1042 miles per hour. On its axis, the earth rotates 360 degrees every 24 hours. Or you can look at it as it takes one day to complete a full circle. Divided up into an hourly rate, the earth rotates 15 degrees every hour (360/24). This number plays an important role in determining time zones.

Answer 2

Greenwich Village of London has a longitude of 0°, to calculate any point's local time,generally we compare that time zone with the Greenwich's time zone.

This theory or method is also known as GMT theory.

According to this theory;

1° longitudinal difference = 4 mins of time difference

Time is subtracted of west longitudes from the greenwich's time.

On the other hand time is added of east longitudes from the greenwich's time.

By applying this theory;

If it is 12 noon at 60 degree east longitude ;

Then the time of Greenwich at that moment is;

60°=240 mins=4 hrs,of time difference

12p.m-4hrs = 8 a.m

the time at 30 degree west longitude will be;

30°=120 mins=2 hrs of time difference

8a.m-2hrs=6 a.m