The internal length of a room is two times its breadth and three times its height. The total cost of painting its four walls at the rate of Rs 25/m2 is Rs. 3,600. What is the cost of laying a carpet on its floor at the rate of Rs. 90.50/m2?

• A. Rs. 6,516
• B. Rs. 7,240
• C. Rs.5,430
• D. Rs. 5, 970