Melt or empty one solid into n smaller identical ones: how many

1. A.
   32
2. B.
   64
3. C.
   12
4. D.
   54

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1. A.
   $\left(\frac{R}{r}\right)^3$
2. B.
   $\left(\frac{2R}{r}\right)^3$
3. C.
   $\left(\frac{R}{2r}\right)^3$
4. D.
   $\left(\frac{4R}{3r}\right)^3$

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1. A.
   14
2. B.
   18
3. C.
   24
4. D.
   30

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