Find the area of four walls of a room having length 12.5 m, breadth 9 m, and height 7 m.

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Accepted Answer

The area of the four walls of a room is calculated using the formula:  
$$ 	ext{Area} = 2 	imes (	ext{length} 	imes 	ext{height} + 	ext{breadth} 	imes 	ext{height}) $$

Substitute the given values:  
$$ 	ext{Area} = 2 	imes (12.5 	imes 7 + 9 	imes 7) $$  
$$ = 2 	imes (87.5 + 63) $$  
$$ = 2 	imes 150.5 $$  
$$ = 301 \, 	ext{m}^2 $$

Thus, the correct answer is **(d) 301 m²**.

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