Two concentric circles with common centre have radii and

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

Problem

Two concentric circles with common centre

O

have radii

6\,\text{cm}

and

8\,\text{cm}

. From an external point

P

, tangents

PA

and

PB

are drawn to the smaller and larger circle respectively. If

PA=8\,\text{cm}

, then

PB

equals (a)

8\,\text{cm}

(b)

10\,\text{cm}

(c)

6\,\text{cm}

(d)

5.3\,\text{cm}