12. A wire is bent to form a square of side 22 cm. If the wire is rebent to form a circle, then its radius will be
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Answer:
The perimeter of square will be equal to perimeter of the circle
therefore, perimeter of square= 4×22
= 88 cm^2
perimeter of circle=88cm^2
since, perimeter= 2πr
therefore, 88= 2×22/7×r
14= radius (ans)
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