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Question
Why is it 5.30 p.m in India when it is 12.00 noon in London?
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Solution
As we know that the earth rotates form west to east, the sun rays first fall on the eastern most longitudes. so, the countries which are on the eastern side of Prime meridian are ahead of it whereas western parts of Prime Meridian are behind it. In London, the Greenwich Mean Time (GMT) is followed.
The Indian Standard Meridian is located 82 and half degree east of the Prime Meridian. Thus, the Indian Standard Time (IST) is 5 hours and 30 minutes ahead of GMT. That is why, when it is 12 noon in London, it is 5.30 P.M. in India.
Time in India is ahead of London. It is 4 minutes ahead at every longitude towards the East. Hence, time in India is ahead of London by 5:30 hours (4×8212=330 minutes or 5:30 hours)
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As we know that the earth rotates form west to east, the sun rays first fall on the eastern most longitudes. so, the countries which are on the eastern side of Prime meridian are ahead of it whereas western parts of Prime Meridian are behind it. In London, the Greenwich Mean Time (GMT) is followed.
The Indian Standard Meridian is located 82 and half degree east of the Prime Meridian. Thus, the Indian Standard Time (IST) is 5 hours and 30 minutes ahead of GMT. That is why, when it is 12 noon in London, it is 5.30 P.M. in India.
Time in India is ahead of London. It is 4 minutes ahead at every longitude towards the East. Hence, time in India is ahead of London by 5:30 hours (4×8212=330 minutes or 5:30 hours)
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