Answers

2015-06-03T22:14:27+05:30
Volume of first sphere = 4×r³×π / 3 = V₁
Volume of second sphere = 4×(2r)³×π / 3 = 4×8r³×π / 3 = V₂
Ratio = V₁ / V₂
        = (4×r³×π / 3) / (4×8r³×π / 3)
        = 4×r³×π / 4×8r³×π
        = r³ / 8r³
        = 1 / 8
        = 1:8
As it turns out, if the radius is increased by n (2 in this case), the volume of the sphere is increased by n³ (2³=8)
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