Question

A wire of length $28\pi$ units is bent to form a circle. What is the radius of the circle formed?

• A. $28$ units
• B. $14$ units
• C. $42$ units

Answer 1

The correct option is B $14$ units

The length of the wire will be equal to the circumference of the cirle.

Therefore, circumference $=28\pi$ units

Circumference of a circle $=2\pi r$

$28\pi =2\pi r$

$\frac{28\pi }{2\pi }=\frac{2\pi r}{2\pi }$

$14=r$

Therefore, the radius of the circle is $14$ units.