UPSKILL MATH PLUS
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Learn moreTwenty-seven solid iron spheres, each of radius \(r\) and surface area \(S\) are melted to form a sphere with surface area \(S’\). Find the
(i) radius \(r’\) of the new sphere \(=\)
(ii) ratio of \(S\) and \(S’\) \(=\) \(:\)
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