A wire is in the form of square with side 44 cm. It is bent to form a circle. What is the radius of the circle?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 28 cm.
The side length of the square is = 44 cm
The perimeter of a square = 4 × side length
⇒ Perimeter = 4 × 44 cm = 176 cm
When the wire is bent to form a circle, the length of the wire becomes the circumference of the circle.
⇒ circumference = 2πr
⇒ 176 = 2πr
⇒ r = 176 × 1/2 × 7/22 = 28 cm