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In figure, CPD and APB are common tangen...

In figure, CPD and APB are common tangents to the two circles with centres O and O'. The radii of the two circles are 3 cm and 5 cm respectively. If `AP : PB = 1 : 3` and `CP = 4 cm.` Find the length of PB and OO'.

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The correct Answer is:
`PB = 12 cm, OO' = 20 cm.
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NAGEEN PRAKASHAN ENGLISH-CIRCLES-Exercise
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