The dimensions of a room are given as $l = 12 cm, b = 10 cm, h = 8 cm$ . Find the total area of $4$ walls.

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Solution

The given dimensions of a room are $l = 12; b = 10; h = 8$

Area of $4$ walls is given as $= 2 h (l + b)$
$= 2 (8) (12 + 10)$
$= 16 (22)$
$= 252 {cm}^{2}$

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