Q : 2 The length, breadth and height of a room are , and respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of per .
Dimensions of the room =
Required area to be whitewashed = Area of the walls + Area of the ceiling
Cost of white-washing per area =
Cost of white-washing area =
Therefore, the required cost of whitewashing the walls of the room and the ceiling is