Question

the walls and ceiling of a room are to be plastered. the length, breadth, and height of the room are 4.5m, 3m, and 350cm. find the cost of plastering the room at tbe rate of rupees 12 per m^2

Answer 1

refer the attachment for the answer
the answer is RS 792.
method is in the image.

hope it helped

Answer 2

area of walls + area of ceiling
2 (l+b)h + lb

area = 66m^2

cost of 66m^2 = rs.792.