The number of balls of radius $1$ cm that are made from a solid sphere of radius $4$ cm

64

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16

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12

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4

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Solution

The correct option is A $64$
$N o o f b a l l s = \frac{V o l u m e o f s o l i d s p h e r e}{v o l u m e o f b a l l} = \frac{\frac{4}{3} π .4 \times 4 \times 4}{\frac{4}{3} π \times 1 \times 1 \times 1} = 64 b a l l s$

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