Three resistors, with resistances $R_1$, $R_2$ and $R_3$, are joined in series and have a total resistance of $500\,\Omega$. If they are then connected in parallel, the total resistance is found to be $50\,\Omega$. Which values match these results?
- A$R_1 = 160\,\Omega,\; R_2 = 160\,\Omega,\; R_3 = 80\,\Omega$
- B$R_1 = 200\,\Omega,\; R_2 = 200\,\Omega,\; R_3 = 100\,\Omega$
- C$R_1 = 225\,\Omega,\; R_2 = 225\,\Omega,\; R_3 = 50\,\Omega$
- D$R_1 = 230\,\Omega,\; R_2 = 230\,\Omega,\; R_3 = 40\,\Omega$