Question

The walls and ceiling of a room are to be plastered, Length=4.5cm,Breadth=3m,height=350cm. Find the cost of plastering. ​

Answer 1

Answer:

Given :

length (l) = 4.5 m

breadth (b) = 3 m

height (h) = 350 cm = 3.5 m

Cost of plastering = Rs. 8 per meter square

Area of the walls = 2h (l + b)

Area of the walls = 2×3.5(4.5 + 3

Area of the walls = 52.5 m²

Area of ceiling = lb = 4.5×3 = 13.5 m²

Area of room = 52.5 + 13.5 = 66 m²

Hence,

the cost of plastering = 66 × 8 = Rs. 528