If the dimensions of a room are I, b and h, (∴. l → length, l → breadth and h → hight) them which of the following is the area of its four walls
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The length of the room =l
The breadth of the room =b
The height of the room =h
Therefore, the area of four walls will be
=2×(lh+bh)
=2(l+b)h
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