Answer :

The figure is shown below:



Diameter of larger circle = 1 cm


Hence, diameter of smaller circle = cm


Let r = Radius of smaller circle =


If r = radius of circle


Circumference =


As seen from figure,


Radius of Larger circle = 2r


Perimeter of smaller circle = 2 × π × r …(eq)2


Perimeter of larger circle = 2 × π × (2r) = 4 × π × r …(eq)1


Perimeter of larger circle is = (eq)1 – (eq)2


More then smaller circle by


= (4 × π × r) – (2 × π × r)


= 2 × π × r



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