The length, breadth and height of a room are 5m, 4m and 3m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of `R sdot 7. 50m^2dot`

Explanation

given `l=5m`

`b=4m`

`h=3m`

area of the walls of the room and the ceiling `=2(bh+hl)+lb`

`=2(4xx3+3xx5)+5xx4`

`=74m^2`

the cost of white washing `=74xx7.5 rupees`

`=555 rupees`