the length and breadth of a room are in the ratio of 3:2. It's height is equal to half of its length. If the cost of carpeting the floor at Rupees 4 per m^2 is Rupees 216, then the area of the four walls(in m^2) is
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ee let length = 3x ,b=2x,then h=3x/2 as it is half it
now area of the floor will be
216/4 as cost of 1 m sq is 4
=54 m sq
then we can say area of floor =l×b=3x×2x=6x m sq
which is = 54 m sq=6x
x=9m
area of 4 wall =2×h×l+b
3x×5x=15x
now put the value of x
15×9=135 m sq
ee let length = 3x ,b=2x,then h=3x/2 as it is half it
now area of the floor will be
216/4 as cost of 1 m sq is 4
=54 m sq
then we can say area of floor =l×b=3x×2x=6x m sq
which is = 54 m sq=6x
x=9m
area of 4 wall =2×h×l+b
3x×5x=15x
now put the value of x
15×9=135 m sq
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