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Question-150789




Question Number 150789 by cherokeesay last updated on 15/Aug/21
Answered by nimnim last updated on 15/Aug/21
(1/( (√r)))=(1/( (√R)))+(1/( (√R)))⇒(1/( (√r)))=(1/2)+(1/2)  ⇒r=1  S_(area) =π(1)^2 =π cm^2
$$\frac{\mathrm{1}}{\:\sqrt{{r}}}=\frac{\mathrm{1}}{\:\sqrt{{R}}}+\frac{\mathrm{1}}{\:\sqrt{{R}}}\Rightarrow\frac{\mathrm{1}}{\:\sqrt{{r}}}=\frac{\mathrm{1}}{\mathrm{2}}+\frac{\mathrm{1}}{\mathrm{2}} \\ $$$$\Rightarrow{r}=\mathrm{1} \\ $$$${S}_{{area}} =\pi\left(\mathrm{1}\right)^{\mathrm{2}} =\pi\:{cm}^{\mathrm{2}} \\ $$
Commented by cherokeesay last updated on 15/Aug/21
thanks !
$${thanks}\:! \\ $$

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