Question

2. The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the
cost of white washing the walls of the room and the ceiling at the rate of
7.50 per m?​

Answer 1

Your answer is ₹405.

Are of four walls of a room= 2(l+b)×h

= 2(5m+4m)×3m

= 2×9m×3m

= 54m²

Therefore, cost of white washing the walls of the room for 54m² is:

54m²× ₹ 7.50

= ₹ 405

Hope this helps..