Question
The diameter of the iron ball used for the shot -put game is 14 cm. It is melted and then a solid cylinder of height
`2 1/3` cm is made . what will be the diameter of he base of the cylinder ?
Answer: Option C
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Let he radius of the cylinder be R.
Then , ` pi xx R^2 xx 7/2 = 4/3 pi xx 7 xx 7 xx 7`
`rArr R^2 = ((4 xx 7 xx 7 xx 7)/(3) xx 3/7)`
`rArr R^2 = 196`
`rArr R = 14`
`:.` Diameter = 2R = 28 cm.
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