How many balls, each of diameter 2 cm, can be made from a solid sphere of lead of diameter 16 cm.
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Answer:
512
total balls = vol of bigger sphere ÷ vol of smaller sphere
= (4/3)π(16)^3 ÷ (4/3)π(2)^3
= 16^3 ÷ 2^3
= 8^3
= 512
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