Question

The walls and ceiling of a room are to be plastered the length breadth height of the room are 4.5m,3 m,350cm respectively find the cost of plastering at the rate of 8 per m square

Answer 1

Area to be plastered  = [2(l + b) x h] + (l x b)

                                       = [2(4.5+3) x 3.5] + (4.5 x 3)

                                       = 52.5 + 13.5

                                       = 66m²

Cost of plastering          = 66 x 8 = 528