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From a point `Q` , the length of the tangent to a circle is 24cm and the distance of `Q` from the centre is 25cm. The radius of the circle is

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From a point Q, the length of the tangent to a circle is 24 cm and the distance of Q from the centre is 25 cm. The radius of the circle is (A) 7 cm (B) 12 cm (C) 15 cm (D) 24.5 cm

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