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Q.

If the perimeter of a square is 36 cm, then find its area.

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a

80 cm²

b

81 cm²

c

90 cm²

d

79 cm²

answer is B.

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Detailed Solution

detailed_solution_thumbnail

Given,

The perimeter of a square = 36 cm

Let 's' be the side of a square.

The perimeter of a square = 4 x side of a square.

Side of a square = $\frac{36}{4}$ = 9 cm.

The area of the square = (side)²

= (9)²

= 81 cm²

Therefore, the area of a square is 81 cm².

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If the perimeter of a square is 36 cm, then find its area.