Question

3/the internal measures of a cuboidal room are 12mx8mx4m. Find the total cost of
white washing all four walls of the room, If the cost of white washing is 5 per
What will be the cost of white washing of the ceiling of the room is also white​

Answer 1

Answer:

let, l = 12m , b = 8m, h = 4m

then curved surface area = 2h(l + b)

= 2×4(12+8) = 160m^3

now 5 rupees per m^3

so cost = 160×5 = 800 rupees

I hope it helps