Find the area of the four walls of a room whose length is `6\ m ,` breadth `5\ m` and height `4\ m` . Also find the cost of white-washing the walls, if the rate of white washing is Rs. `5\ p e r\ s q u a r e\ m e t e rdot` (Doors, Windows and other opening ignored)

Explanation

length is 6m, breadth is 5m and height is 4m
surface area of wall `=2(bh+hl)`
`=2(5xx4+4xx6)`
`=88cm^2`
cost of whitewashing the wall`=5xx88`

`=440 rupees`