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 _______

Two circles with centres O and O? and of radii 6 cm and 4 cm touch eac

1.	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
Answer» C. \[3\sqrt{5\text{ }}cm\]

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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 _______

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