Question
Find the number of lead balls , each 1 cm in diameter that can be made from a sphere of diameter 1.2 cm.
Answer: Option A
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Volume of larger sphere = `(4/3 pi xx 6 xx 6 xx6) cm^3 = 288 pi cm^3`
volume of 1 small lead ball = `4/3 pi xx 1/2 xx 1/2 xx 1/2) cm^3 = pi/6 cm^3`
Number of lead balls = `(288 pi xx 6/pi)` = 1728.
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