An electric power cable is made up of six copper wires $c$ that surround a steel core $s$. For a $1.0\,\text{km}$ section of one copper wire, the resistance is $10\,\Omega$ and, for a $1.0\,\text{km}$ section of the steel core, the resistance is $100\,\Omega$. What is the approximate resistance of a $1.0\,\text{km}$ section of the power cable?
- A$0.61\,\Omega$
- B$1.6\,\Omega$
- C$160\,\Omega$
- D$610\,\Omega$