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PQRS is the diameter of a circle of radius 6 cm. The lengths PQ, QR and RS are equal. Semi-circles are drawn with PQ and QS as diameters as shown in the figure alongside. Find the ratio of the area of the shaded region to that of the unshaded region.

A

`1 : 2`

B

`25 : 121`

C

`5 : 18`

D

`5 : 13`

Text Solution

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The correct Answer is:
D
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