Question

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 `R s 7. 50 p e r m^2dot`

Answer 1

Area of walls and celling = lateral surface area + area + area of celling
`=2(l+b)h+b`
`=2(5+4)3+5xx4`
`=54+20`
`=74 m^(2)`
Cost of white washing at the rate of `Rs. 7.50"per " m^(2)`
`=74xx7.50`
= Rs. 555