Find the total area of four walls in each of rectangular room having length $10 m$ , breath $5 m$ and height $4 m$

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Solution

Calculate the total area of the four walls
Given, length of room, $l = 10 m$
breadth of room, $b = 5 m$
height of room, $h = 4 m$
Area of the $4$ walls $=$ Perimeter of floor $\times$ height
$= 2 (l + b) \cdot h = 2 (10 + 5) \cdot 4 = 120 m^{2}$
Therefore, the total area of the four walls is $120 m^{2}$ .

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