question_answer

Two circles with centres O and O? and of radii 6 cm and 4 cm touch each other internally. If the perpendicular bisector of line segment OO? meets the bigger circle in M and N, then the length of MN is _______

A) 1cm

B)                                             \[2\sqrt{35\text{ }}cm\]

C)  \[3\sqrt{5\text{ }}cm\]                                                  

D) \[\sqrt{35\text{ }}cm\]

E)  None of these