Çözüldü Circles That Are Tangent To One Another

Two circles both of radii 6 have exactly one point in common. If A is a point on one circle and B is a point on the other circle, what is the maximum possible length for the line segment AB?

A) 12
B) 15
C) 18
D) 20
E) 24

Maximum( |AB| ) = 4·6 = 24 units.
https://images.collegedunia.com/pub...paper/1619788805SAT Math practice paper 3.pdf
(The last question without answer key or solution)