The difference between IST & GMT is

1. 6 hours
2. 4 hours 30 minutes
3. 5 hours 30 mins
4. 12 hours

Which of the following statement about Great circle is true?

1. All the parallels are Great circles.
2. Navigators find it difficult to follow the route of Great circle.
3. Equator & all the meridians are Great circles.
4. All the above.

Arunachal Pradesh Chief Minister Pema Khandu demanded for a separate time zone for north-eastern states. Khandu said 'We get up as early as 4 am. Several daylight hours are wasted as government offices open only at 10 am and close at 4pm. Leaders from the region argue that a separate time zone would increase daylight savings and efficiency.

As a student of Geography explain the reason for the wasting of daylight hours in Arunachal Pradesh as told by Khandu.

The history of the International Date Line dates back to the Christian era 1522, when Magellan's crew reached home after circumnavigating the world for the first time by ship. They thought it was 5th September but actually they reached on 6th September. Why was it happened?