In Fig., $${R_a},\,\,{R_b},$$ and $${R_c}$$ are $$20\,\Omega ,\,\,10\,\Omega $$ and $$10\,\Omega $$ respectively. The resistances $${R_1},\,\,{R_2}$$ and $${R_3}$$ in $$\Omega $$ of an equivalent star - connection are

In Fig., the value of resistance $$R$$ in $$\Omega $$ is

In Fig. the value of $$R$$ is

Consider the star network shown in Fig. The resistance between terminals $$A$$ and $$B$$ with $$C$$ open is $$6\,\Omega ,$$ between terminals $$B$$ and $$C$$ with $$A$$ open is $$11\,\Omega ,$$ and between terminals $$C$$ and $$A$$ with $$B$$ open is $$9\,\Omega $$ . The values of $${R_A},\,\,{R_B},\,\,{R_C}$$ are: