Points and lie on a circle

MATHEMATICS · Single correct · CBSE · Mathematics · Circles · Circles

Problem

Points

P, Q,

and

R

lie on a circle. It is given that

\angle QPR = 90^{\circ}

and

PQ = 18\,\text{cm}

,

PR = 24\,\text{cm}

. What is the radius of the circle? (a)

30\,\text{cm}

(b)

15\,\text{cm}

(c)

12\,\text{cm}

(d)

21\,\text{cm}

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