Question
The circles are not drawn to scale. The small circle is with radius b and the big circle is with radius B. The ratio of b to B is 5 : 7. If the area of the small circle is 256π cm2, find B. Express your answer in mixed number.
2 m

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The circles are not drawn to scale. The small circle is with radius b and the big circle is with radius B. The ratio of b to B is 5 : 7. If the area of the small circle is 256π cm2, find B. Express your answer in mixed number.