Question

why is it 5.30 p.m in India and 12.00 noon in london

Answer 1

Answer:

• The “Greenwich Mean Time” (GMT) is being followed in London.
• The Indian Standard Meridian is situated ‘east of the Prime Meridian’ at 82 1⁄2°.  

• The “Indian Standard Time” (IST) is ahead of GMT for ‘5 hours and 30 minutes’.
• That's why it's ‘5:30 P.M’ in India, When it's 12 noon in London.

• As we understand the world is rotating west to east, the first drop of the sun rays on the most eastern lengths.
• The nations on the eastern side of Prime Meridian are therefore ahead of it, while the western sections of Prime Meridian are behind it.

Answer 2

Answer:

The Earth rotates 1° in four minute. ... Therefore, the time in India is 5 hrs and 28 minutes ahead of London (since India is located to the east of Greenwich). So if the time in London is 12:00 pm, we will add 5 hrs and 30 minutes to it which will be 5:30 pm.