The bus fare between two cities in the hilly region is five times the square of the distance between them in rupees. The distance from city A to city B is 8 km by direct route. From city B to city A can be reached via city C and D, where the distance of city A and city C is 3 km, the distance from city C to city D is 3 km and the distance from city D to city B is 4 km. What is the difference between the expenditure on both the routes?

• A. Rs. 300
• B. Rs. 250
• C. Rs. 200
• D. Rs. 150