A battery with electromotive force (e.m.f.) $12\,\text{V}$ and negligible internal resistance is connected in parallel to two resistors whose resistances are $R$ and $2R$. The combined power dissipated in the two resistors is $36\,\text{W}$. What is $R$?
- A$0.50\,\Omega$
- B$2.7\,\Omega$
- C$4.0\,\Omega$
- D$6.0\,\Omega$