The length of the tangent from a point \( A \) at a circle, of radi...

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The length of the tangent from a point \( A \) at a circle, of radius \( 3 \mathrm{~cm} \), is \( 4 \mathrm{~cm} \). The distance of \( A \) from the centre of the circle is
(a) \( \sqrt{7} \mathrm{~cm} \)
(b) \( 7 \mathrm{~cm} \)
(c) \( 5 \mathrm{~cm} \)
(d) \( 25 \mathrm{~cm} \)
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