A cylindrical rod whose height is 8 time...

A cylindrical rod whose height is 8 times of its radius is melted and recast into spherical balls of same radius. The number of the balls will be

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Let the number of balls be `n`.
Given that cylindrical rod whose height is 8 times of its radius i.e., `h=8r`
Volume of the cylinder `=nxx` Volume of the sphere
`pir^2h=nxx4/3pir^3`
`pir^2xx8r=nxx4/3pir^3`
`n=6`

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