A wire is in the form of square with side 11 cm. It is bent to form a circle. What is the radius of the circle?
Answer & explanation
Correct answer: option 4
We know that,
Perimeter of square= 4 × side
Circumference of circle= 2πr
We have,
Side of square= 11cm
Perimeter of square= 4 × 11= 44cm
Perimeter of square= Circumference of circle
44 = 2πr
= 44= 2 × \(\frac{22}{7}\) × r
= r = 7cm