From a point Q,


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


From figure,




$\Rightarrow \mathrm{r}=7 \mathrm{~cm}$

Hence, the correct option is (A)

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