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In the figure, the radius of the smaller circle is 3 centimetres, that of the bigger circle is 6 centimetres and the distance between the centres of the circles is 15 centimetres. 'P Q' is a tangent to both the circles. Find ts length.

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V PUBLICATION-TANGENTS-QUESTION BANK
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  16. Draw a circle of radius 3 centimetres. Mark a point 7 centimetres away...

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