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Subjects
Mathematics CBSE
Class 9
Surface Areas and Volumes
Textbook Questions
12.
Exercise Problems IX
Exercise condition:
3
m.
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 \(S’\) \(=\)
\(:\)
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