5. The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5 m. 3 m and 350 cm respectively. Find the cost of plastering at the rate of 78 per m

5. The walls and ceiling of a room are to be plastered. The length, br

1.	5. The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5 m. 3 m and 350 cm respectively. Find the cost of plastering at the rate of 78 per m
Answer» here's your answerStep-by-step explanation:TOTAL cost of Plastering is Rs. 528Step-by-step explanation:Given: Dimensions of Room, Length = 4.5 m , Breadth = 3 m & Height = 350 cm. Cost of Plastering = Rs. 8 per m^2m 2 To FIND: Total cost of PlasteringLength, l = 4.5 mBreadth, b = 3 mHeight, h = 350 cm = 3.5 mArea of Plastering = Area of 4 walls + Area of ceiling = Curved Surface Area of Cuboid + Area of rectangle = 2 × h × ( l + b ) + l × b = 2 × 3.5 × ( 4.5 + 3 ) + 4.5 × 3 = 7 × ( 7.5 ) + 13.5 = 52.5 + 13.5 = 66 m^2m 2 Total cost of Plastering = 66 × 8 = Rs. 528Therefore, Total cost of Plastering is Rs. 528