Question

The circumference of a circular field is $308m$ . Find its radius.

• A. $49m$
• B. $51m$
• C. $69m$
• D. $79m$

Answer 1

The correct option is A $49m$

The circumference of a circular field is $308m$.

We know, the circumference of a circle is $2\pi r$.

Therefore, $2\pi r=308m$

$=>2\times \frac{22}{7}\times r=308m$
$=>r=\frac{308\times 7}{2\times 22}m$

$=>r=\frac{77\times 7}{11}m$

$=>r=7\times 7m$.
$=>r=49m$.

Hence, the required radius is $49m$.

Therefore, option $A$ is correct.