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 respectively. Find the cost of plastering at rate of rupees 8 per m ^2

Answer 1

length (l)=4.5m
breath (b)=3m
Height (h)=350cm=3.5m

area to be plastered=Area of four walls+area of ceiling
=2h(l+b)+lb
=2×3.5(4.5+3)+4.5×3
=7×7.5+13.5
=52.5+13.5
=66 sq m


Cost of plastering =8×66=528 ₹