12. In the given figure, O is the centre of two comcentriccircles of r – InterviewSolution

1.	12. In the given figure, O is the centre of two comcentriccircles of radii 4 cm and 6 om respectively.PA and PB are tangents to the outer and inner circlerespectively. If PA = 10 cm, find the length of PB upto one place of decimal.
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