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Question

In the given figure, PQ is the tangent of the circle. Line segment PR intersects the circle at N and R. PQ = 15 cm, PR = 25 cm, find PN:


A
15 cm
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B
10 cm
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C
9 cm
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D
6 cm
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Solution

The correct option is C 9 cm
PN×PR=(PQ2)PN×25=(15)2
           PN = 9 cm

Quantitative Aptitude

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