posted by manisha .
THE AREA OF 4 WALLS OF A HALL IS 3.20MSq
the length and breabth of hall is 12.5m and 7.5m respectively.find the height of hall.
total area = 3.20 m^2
if h= height of wall (and assuming that the wall is the same height all round) the area of the four walls
=12.5h+12.5h+7.5h+7.5h = 40h