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Rectangle

The dimension...

Question

The dimensions of a rectangular room (cubiodal) are l, b and h. What is the area of its four walls?

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Solution

Let's Say:
Length = $l$
Breadth = $b$
Height = $h$
Lateral surface Area or area of four walls = $2 (l \times h + h \times b)$
$= 2 h (l + b)$

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