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mondalabhilash
If the volume of a sphere increases by 72.8%, then its surface area increases by how much and how ........
The area will increase by ((1+.728)^(2/3)-1)*100% can you solve it? @mondalabhilash
\[Vol \propto r^3\]\[SA\propto r^2\]
\[V'=1.728V\] \[r'^3=1.728r^3\] \[(\frac{r'}{r})^3=1.728\] Now find \[(\frac{r'}{r})^2\], and rearrange to get \[r'^2=???r^2\]