Question

Please answer with proper steps of 3 and 4 question. It is about surface and lateral surface area. Please explain and help.

Answer 1

Area of four Walls of room =2(l+b)h
=2(12+8)4=160m^2
area of ceiling =12×8=96m^2
total area of room =160+96=256m^2
total cost of white washing the room =256×5=rs1280
[Lateral surface area = area of four Walls =2{l+b}×h]