In a circle O is the centre of two concentric circles with radii 4 cm and 6cm respectively , PA is the tangent of larger circle and PB is the tangent of smaller circle. If PA = 10cm , find the length of PB.
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In a circle O is the centre of two concentric circles with radii 4 cm and 6cm respectively , PA is the tangent of larger circle and PB is the tangent of smaller circle. If PA = 10cm , find the length of PB.
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