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Question Number 150136 by Tawa11 last updated on 09/Aug/21

Commented by Tawa11 last updated on 09/Aug/21

$$\mathrm{Thanks}\mathrm{sir}.\mathrm{God}\mathrm{bless}\mathrm{you}.\mathrm{I}\mathrm{appreciate}...$$

Answered by mr W last updated on 09/Aug/21

$$R=\frac{5}{2}$$$$\frac{R-r}{R+r}=\frac{1}{\sqrt{5}}$$$$r=\frac{\sqrt{5}-1}{\sqrt{5}+1}R=\frac{(3-\sqrt{5})R}{2}=\frac{(3-\sqrt{5})5}{4}\approx 0.955$$

Commented by Tawa11 last updated on 09/Aug/21

$$\mathrm{Thanks}\mathrm{sir}.\mathrm{God}\mathrm{bless}\mathrm{you}.\mathrm{I}\mathrm{appreciate}.$$

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