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UPSC CDS Math Area and Perimeter Questions

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Question : 51

Total: 116

The diameters of two given circles are in the ratio 12 : 5 and the sum of their areas is equal to the area of a circle of diameter 65 cm. What are their radii ?

12 cm and 5 cm
24 cm and 10 cm
60 cm and 25 cm
30 cm and 12.5 cm

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