Question

Look at the map of the Time Zones and answer the following questions:

1. What is the Longitudinal degree of IST ______?
2. If it is 2 a.m. IST what will be the Time at Tokyo ______, London ______, San Francisco ______?
3. Name the place which is diametrically opposite of India.
4. Is the Indian Standard Time ahead of San Francisco Time? Give reasons for your answer.

Answer 1

1. The Indian Standard Time (IST) is based on the 82½°E longitude.
2. 
   
   • Tokyo (Japan): Tokyo is 3.5 hours ahead of IST, so if it's 2 a.m. IST, it will be 5:30 a.m. in Tokyo.
   • London (UK): London is 5.5 hours behind IST, so if it's 2 a.m. IST, it will be 8:30 p.m. on the previous day in London.
   • San Francisco (USA): San Francisco is 13.5 hours behind IST, so if it's 2 a.m. IST, it will be 12:30 p.m. on the previous day in San Francisco.
3. The place that is diametrically opposite to India (on the opposite side of the Earth) is in the South Pacific Ocean, near the coast of New Zealand.
4. Yes, Indian Standard Time (IST) is ahead of San Francisco Time (PST). This is because India is located to the east of San Francisco, and the Earth rotates from west to east, meaning places to the east experience time earlier than those to the west. As a result, IST is 13.5 hours ahead of San Francisco Time.