How many balls each of radius $1$ cm, can be made from a copper sphere whose radius is $8$ cm?

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Solution

Number of spherical balls
$= \frac{V o l . o f s p h r i c a l c o p p e r}{V o l . o f a b a l l}$
$\frac{\frac{4}{3} π \times 8 \times 8 \times 8}{\frac{4}{3} π \times 1 \times 1 \times 1} = 512$

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