cost of white washing on its four walls

Question

the length, breadth and height of a room is 8m, 6m and 4m respectively.there is one door of size 1 1/2m * 2 1/2m, two windows each of size 1/2m *1 1/4m and 8 ventilators each of size 0.3m * 0.5m, what is the cost of white washing on its four walls at the rate of rs. 5 per square metre

Answer 1

tu get area av 4 walls av a room: leng=8, wide=6, hite=4

total leng=2*(8+6)=2*14=28

area=length*hite=28*4=112 (square meters)