# Circle area ratio

Geometry Level 3

The diagram above shows a rectangle ABCD with length $$l$$ and breadth $$b$$.
A pink semicircle is inscribed inside this rectangle.
And a green circle is inscribed inside the region between the semicircle and the rectangle as shown.
Find

$\dfrac{\text{area of the semicircle}}{\text{area of the circle}} .$

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