The north-south extension from Kashmir to Kanyakumari is approximately 3,200 km.
India is 3,214 km (1,997 miles) north-south and 2,933 km (1,822 miles) east-west. The land boundary is 15,200 km (9,445 miles) and the coastline is 7,516.6 km (4,671 miles).
Final answer:The north-south extension of India kashmir to kanyakumari is about 3200km.