A truck transporting material to a factory requires 190 litres of gas for every trip to cover 1,500 km. How many litres of gas will it require to cover 1,950 km?

To cover 1,500 km, the truck requires 190 litres of gas.

Therefore, for 1 km, the truck requires 190/1500 = 0.1267 litres.
Therefore, for 1,950 km, the truck will require 0.1267 * 1,950 = 247.335 litres of gas. Answer: \boxed{247.335}.