10.Why is it 5:30 p.m. in India and 12 noon in London?
Answers
Answer:
India is 5 hrs and 28 minutes ahead of London . 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.
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’.
As the Earth rotates from the west to the east, those places which lie to the east of Greenwich are ahead than those places which lie to the west of Greenwich. The Earth rotates 1° in four minute. Thus if India is located to the east of Greenwich at 82°E, we will multiply 82.50 by 4 which will be 330 minutes or 5 hrs and 30 minutes. 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.
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