In the given figure below, two circles with their centres at O and P and radii 9 cm and 4 cm respectively touch each other externally. The length of their common tangent is

In the given figure below, two circles with their centres at O and P a

1.	In the given figure below, two circles with their centres at O and P and radii 9 cm and 4 cm respectively touch each other externally. The length of their common tangent is
A.	8.5 cm.
B.	\[\frac{8}{\sqrt{2}}\] cm.
C.	\[8\sqrt{2}\]cm.
D.	12cm.
Answer» E.

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In the given figure below, two circles with their centres at O and P and radii 9 cm and 4 cm respectively touch each other externally. The length of their common tangent is

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