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Question

If the area of a square is 225 m2, then its perimeter is

(a) 15 m (b) 60 m (c) 225 m (d) 30 m

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Solution

Let a be the side of the square. Then
Area of square = a2
225 = a2
a2 = 152
a = 15 m
Perimeter of the square = 4a = 4 × 15 = 60 m
Hence, the correct option is (b).

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