NCERT Exercise 11.4 Q9 - Surface Areas and Volumes
Question: Twenty seven solid iron spheres, each of radius r and surface area S, are melted to form a sphere with surface area S'. Find (i) radius r' of the new sphere, (ii) ratio of S and S'.
Answer: (i) r' = 3r, (ii) S : S' = 1 : 9.
Full step-by-step NCERT solution with diagrams on Something by Zero.