Chord AB and diameter CD of a circle meet at the point P, outside the circle when it is produced, If PB = 8 cm, AB = 12 cm and distance of P from the centre of the circle is 18 cm, the radius (in cm) of the circle is closest to: [√41 = 6.4]
1
12
2
12.8
3
12.4
4
13
5
None of these