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A tangent PQ at a point P of a circle of...

A tangent PQ at a point P of a circle of radius 5 cm meets a line through the centre O at a point Q so that OQ = 12 cm. Length PQ is :

A

12cm

B

13 cm

C

8.5 cm

D

`sqrt 119` cm

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • The chord of contact of tangents from a point P to a circle passes through Q, If l_1 and l_2 are the lengths of tangents from P and Q to the circle, then PQ is equal to :

    A
    `(l_1+l_2)/2`
    B
    `(l_1-l_2)/2`
    C
    `sqrt((l_1^2+l_2^2))`
    D
    `sqrt((l_1^2-l_2^2))`

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