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If the surface area of two spheres is in the ratio 81 : 25, then what is the ratio of their radius.
Question
If the surface area of two spheres is in the ratio 81 : 25, then what is the ratio of their radius.
A.
7 : 9
B.
9 : 5
C.
5 : 8
D.
5 : 7
Solution
Correct option is B
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