Question
A solid metallic spherical ball of diameter 6 cm is melted and recast into a cone with diameter of the base as 12 cm the height of the cone is :
Answer: Option B
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Let the height of the cone be h cm. .Then ,
`1/3 pi xx 6 xx 6 xx h = 4/3 pi xx 3 xx 3 xx 3`
`rArr h = ((36 xx 3)/(36))`
`rArr h = 3 cm.`
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