The area of a sector of a circle is and its central angle is

MATHEMATICS · Single correct · CBSE · Mathematics · Areas Related to Circles · Areas Related to Circles

Problem

The area of a sector of a circle is

77\,\text{cm}^2

and its central angle is

45^\circ

. Using

\pi = \dfrac{22}{7}

, find the radius of the circle. (a)

28\,\text{cm}

(b)

14\,\text{cm}

(c)

7\sqrt{2}\,\text{cm}

(d)

14\sqrt{2}\,\text{cm}