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The radius of a spherical balloon increases from 3 cm to 9 cm as air being pumped into it. Find the ratio of volumes of the balloon in the two cases
Question

The radius of a spherical balloon increases from 3 cm to 9 cm as air being pumped into it. Find the ratio of volumes of the balloon in the two cases

A.

1 : 3

B.

1 : 9

C.

1 : 27

D.

1 : 8

Correct option is C

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