P and Q are centres of circles of radii ...

P and Q are centres of circles of radii 9 cm and 2 cm respectively. PQ = 17 cm. R is the centre of a circle of radius x cm which touches the above circles externally. Given that `anglePRQ = 90^@` , write an equation in x and solve it.

A

x=6

B

x=7

C

x=8

D

x=9

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A

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