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If the radii of two circles be 6 cm and ...

If the radii of two circles be 6 cm and 3 cm and the length of the transverse common tangent be 8 cm, then the distance be tween the two centres is

A

`sqrt 150 cm`

B

`sqrt 135 cm`

C

`sqrt 145 cm`

D

`sqrt 140 cm`

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