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The area of a square field is 2025 m². Find its perimeter.

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180 m

200 m

160 m

220 m

answer is A.

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Detailed Solution

Given: Area of square (a²) = 2025 m²

⇒ a² = 2025

⇒ a = √2025

⇒ a = √ (3 x 3) x (3 x 3) x (5 x 5)

⇒ a = 3 x 3 x 5

⇒ a = 45 m

We know that the perimeter of a square = 4a

= 4 x 45

= 180 m

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