A piece of wire when bent to form a circle will have a radius

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A piece of wire when bent to form a circle will have a radius of 84 cm. If the wire is bent to form a square, the length of a side of the square is

1. 152 cm
2. 132 cm
3. 168 cm
4. 225 cm

Correct Option: B

Using Rule 14,
Length of wire = Circumference of circle = 2πr

= 2 ×	22	× 84 = 528 cm.
	2

∴ Perimeter of square = 528 cm.
⇒ 4 × side = 528

⇒ Side =	528	= 132 cm.
	4