Centre of two concentric circles is O. The area of two circles is 616 cm2 and 154 cm2 respectively. A tangent is drawn through point A on the larger circle to the smaller circle. This tangent touches small circle at B and intersects larger circle at C. What is the length (in cm) of AC?

Centre of two concentric circles is O. The area of two circles is 616

1.	Centre of two concentric circles is O. The area of two circles is 616 cm2 and 154 cm2 respectively. A tangent is drawn through point A on the larger circle to the smaller circle. This tangent touches small circle at B and intersects larger circle at C. What is the length (in cm) of AC?
A.	12√3
B.	14√3
C.	10√6
D.	18√2
Answer» C. 10√6

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Centre of two concentric circles is O. The area of two circles is 616 cm2 and 154 cm2 respectively. A tangent is drawn through point A on the larger circle to the smaller circle. This tangent touches small circle at B and intersects larger circle at C. What is the length (in cm) of AC?

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