Two non-intersecting circles with radii ‘r’ units and ‘2r’ units have their centres at a distance of 2√3r units. Find the length of the direct common tangent to the circles.

1) 3r units
2) √13 r units
3) √11r units
4) √10r units

• sqrt((2sqrt3r)2-(2r-r)2) = sqrt11r units
• 8 years agoHelpfull: Yes(0) No(0)