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mondalabhilash Group Title

If the volume of a sphere increases by 72.8%, then its surface area increases by how much and how ........

  • 2 years ago
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  1. mayankdevnani Group Title
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    The area will increase by ((1+.728)^(2/3)-1)*100% can you solve it? @mondalabhilash

    • 2 years ago
  2. henpen Group Title
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    \[Vol \propto r^3\]\[SA\propto r^2\]

    • 2 years ago
  3. henpen Group Title
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    \[V'=1.728V\] \[r'^3=1.728r^3\] \[(\frac{r'}{r})^3=1.728\] Now find \[(\frac{r'}{r})^2\], and rearrange to get \[r'^2=???r^2\]

    • 2 years ago
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