Question
A cylinder with base radius of 8 cm and height of 2 cm is melted to form a cone of height 6 cm . The radius of the cone will be :
Answer: Option D
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Let the radius of the cone be r cm
Then , `1/3 pi xx r^2 xx 6 = pi xx 8 xx 8 xx 2 `
`hArr r^2 = ((8 xx 8 xx 2 xx 3)/(6)) = 64`
`hArr r^2 = 64`
`hArr r = 8.cm.`
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