Question

The circumference of a circle is approximately equal to $157$ units. Taking the value of $\pi =3.14$, what is the radius of the circle?

• A. $50$ units
• B. $25$ units
• C. $30$ units
• D. $12.5$ units

Answer 1

The correct option is B $25$ units


Circumference of a circle $=2\pi r$

Circumference of the given circle $=157$ units

$2\pi r=157$

$2\times 3.14\times r=157$

$\frac{2\times 3.14\times r}{2\times 3.14}=\frac{157}{2\times 3.14}$

$r=25$ units

The radius of the circle is $25$ units.