\(x\,\, = \,\,\frac{{\sqrt 9 }}{{\sqrt 9 \,\, + \;\,\sqrt 3 }}\,\,r\,\, = \,\,\frac{{3r}}{{3\,\, + \,\,\sqrt 3 }}\,\,x\,\, = \,\,\frac{r}{{1\,\, + \;\,\sqrt 3 /\,3}}\)

\(x\,\, = \,\,\frac{r}{{1\,\, + \;\;1\,\,/\,\,\sqrt 3 }}\) જે આપેલ વિકલ્પ છે.