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The circumferences of two circles are touching externally. The distance between their centres is 12 cm. The radius of one circle is 7 cm. Find the diameter (in cm) of the other circle.
Let $$x=7$$ be the radius of first circle and $$y$$ be the radius of second circle.
$$\therefore$$ Diameter of second circle = $$2\times5=10$$ cm
=> Ans - (B)
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