Question

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 1

Answer:

here's your answer

Step-by-step explanation:

Total cost of Plastering is Rs. 528

Step-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 Plastering

Length, l = 4.5 m

Breadth, b = 3 m

Height, h = 350 cm = 3.5 m

Area 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. 528

Therefore, Total cost of Plastering is Rs. 528