Question

Please answer me this question.

Answer 1

let OQ=x
AB is a chord then AP=PB=3
CD is a chord then CQ=QD=6
(3+x)power 2 +3 power2=OA power 2
x power2+6 power2=OC power2
OC and OA is a radius OA=OC
(3+x) power2+3 power2=x power2+ 6 power2
9+x power2+6x+9=36+x power2
18+6x=36
6x=18
x=3