Question

the length breadth and height of a room are 5m 4m and 3m respectively find the cost of white washing its curved surface at the rate of RS per 210 and 400 sqm also find volume of air inside tomb

Answer 1

volume= length*breadth*height
v=5*4*3
v=60 m³
therefore volume of air inside it =60m³

total area to be white washed=
2(length*breadth)+2(length*height)+2(breadth*height)
=2(5*4)+2(5*3)+2(4*3)
=40+30+24
=94m²
cost of white washing=210/400 *94
=21*94/40
=49.35