Q9 of 70 Page 21

If the radius of a sphere is doubled, what is the ratio of the volume of the first sphere to that of the second sphere?

Volume of a sphere = (4/3)πr3


Let the radius of first sphere be’r’.


Radius of 2nd sphere = 2r


Ratio of the volume of the first sphere to that of the second sphere = 1 : 8


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