Explanation:

Introduction:
The discrepancy in the sunrise time between Arunachal Pradesh and Gujarat is due to the difference in their longitudinal positions. Despite this difference, the watches in both regions show the same time. This phenomenon can be explained by considering the concept of time zones and the use of standard time across a country.

Time Zones:
- Time zones are regions that have the same standard time. They are established to ensure that the time remains consistent within a particular area.
- The Earth is divided into 24 time zones, each approximately 15 degrees of longitude wide. This division helps in maintaining a uniform time across different regions.

Arunachal Pradesh and Gujarat:
- Arunachal Pradesh is situated in the northeastern part of India, while Gujarat is located in the western part of the country.
- Due to their longitudinal difference, Arunachal Pradesh is ahead of Gujarat by approximately two hours.
- Arunachal Pradesh lies in a time zone that is two hours ahead of Gujarat's time zone.

Standard Time:
- Despite the difference in longitudinal positions, watches in both regions show the same time. This is because standard time is used across a country, ensuring uniformity within its boundaries.
- In India, the standard time is based on the longitude of the city of Mirzapur, Uttar Pradesh, which lies near the center of the country.
- The entire country follows Indian Standard Time (IST), which is set at GMT+5:30. This means that the time in Arunachal Pradesh and Gujarat is adjusted to match the standard time of GMT+5:30.

Implications:
- As a result of using standard time, the watches in both Arunachal Pradesh and Gujarat show the same time, despite the actual time difference caused by their longitudinal positions.
- This allows for consistency and ease of communication across different regions of the country.
- However, it is important to note that the actual sunrise and sunset times still vary between Arunachal Pradesh and Gujarat due to their geographical locations.

Conclusion:
In summary, the sun rises two hours earlier in Arunachal Pradesh compared to Gujarat due to their longitudinal difference. However, the watches in both regions show the same time because of the use of standard time across the country. This ensures uniformity in timekeeping, despite the actual time difference caused by geographical factors.

bcoz of the lines on latitude