Question

why is difference between the durations of day and night hardly at left at Kanyakumari but not so in Kashmir

Answer 1

As equator receives direct sunlight, the duration between day and night would hardly be felt at Kanyakumari. On the other hand, Kashmir is at 37°N latitude, which means that it is 37 degrees away from the equator or it is 37 degrees away from the area which receives direct sunlight.