What is the distance from Chennai to trivandrum?

Chennai Egmore (MS) to Trivandrum Central (TVC) 798 km by Anantapuri Exp (6123); 16hr 00min; 25 stops.
Chennai Central (MAS) to Trivandrum Central (TVC) 909 km by Trivandrum Mail (2623); 15hr 35min; 19 stops.