What are perimeters of a circle and a square of radius 'r' and side 'a' respectively?

2πr, 4a

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πr, 4a

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2πr, 2a

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4πr, 4a

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Solution

The correct option is A
2πr, 4a

Perimeter of circle = 2πr

Perimeter of square = 4a

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