If the ratio of the volume of two spheres is $1 : 8$ , then the ratio of there surface area is:

1 : 2

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1 : 4

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1 : 8

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1 : 16

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Solution

The correct option is B $1 : 4$
Volume ratio=1:8
radil ratio= ${(1)}^{1 / 3} : {(8)}^{1 / 3} = 1 : 2$
Surface area ratio=1:4

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