Twenty-seven solid iron spheres, each of radius r and surface area S a – InterviewSolution

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1.	Twenty-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'.
Answer» ANSWER :(i) R. = 3R (II) 1:9

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