Question

Dimension of four wall room is 60cm,20cm,15cm.Find the cost of white washing of four wall at 5rupees per cm square

Answer 1

Area of four walls room =2(length+breadth)h
=[2(60+20)15]cm^2
=(2×80×15)cm^2
=2400cm^2
cost of cm^2 Washing =5rs
cost of 2400cm^2 Washing=(2400×5)rs
=2400cm^2