Explanation: To understand the concept of longitudes and the distance between Arunachal Pradesh and Gujarat, it is essential to first grasp the basics of geographical coordinates. Longitudes are imaginary lines that run from the North Pole to the South Pole and are used to measure distances east and west of the Prime Meridian, which is located at 0 degrees longitude. The Prime Meridian passes through the Royal Observatory in Greenwich, England.
Arunachal Pradesh is located in the northeastern part of India, while Gujarat is situated in the western part of the country. The geographical coordinates of these states are crucial in determining the distance between them in terms of longitudes. Arunachal Pradesh is approximately between 90°E and 97°E longitude, while Gujarat is roughly between 68°E and 75°E longitude.
To calculate the distance between these two states in terms of longitudes, we need to find the difference between their longitudinal coordinates. The easternmost part of Arunachal Pradesh is around 97°E, and the westernmost part of Gujarat is around 68°E. The difference between these two longitudes is:
\[ 97°E - 68°E = 29° \]
This calculation shows that the distance between Arunachal Pradesh and Gujarat is approximately 30 longitudes. This is why option C is the correct answer.
It is important to note that the exact distance can vary slightly depending on the specific points within each state that are being considered. However, for the purpose of this question, the approximate distance of 30 longitudes is accurate and sufficient.
Understanding the concept of longitudes and their application in measuring distances between geographical locations is crucial for various fields, including geography, navigation, and cartography. This knowledge helps in comprehending the spatial relationships between different regions and is often tested in competitive examinations such as the UPSC Civil Services and State PSC Exams.