A) 24
B) 85
C) 64
D) 46
Correct Answer: C
Solution :
(c): no. of lead balls \[\frac{V}{v}=\frac{\frac{4}{3}\pi {{R}^{3}}}{\frac{4}{3}\pi {{r}^{3}}}\] \[={{\left( \frac{R}{r} \right)}^{2}}={{\left( \frac{4}{1} \right)}^{3}}=64\]
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