The cost of painting the four walls of a room is Rs.350. The cost of painting a room three times in length, breadth and height will be :
Pick:  A) Rs.1050  B) Rs.1400  C) Rs.3150  D) Rs.4200  E) None
Explanation:   Area of 4 walls of the room = [2(l+b)×h]m2   Area of 4 walls of new room = [2(3l+3b)×3h]m2 = 9[2(l+b)×h]m2   Rs.3150ost of painting the 4 walls of new room = Rs.(9×350)=Rs.3150   Rs.3150orrect Option: Rs.3150
<result>C</result>
The cost of painting the four walls of a room is Rs.350. The cost of painting a room three times in length, breadth and height will be :