A steady $60\,\text{V}$ d.c. supply is placed across two resistors with resistances $400\,\text{k}\Omega$ and $200\,\text{k}\Omega$. If a voltmeter with resistance $200\,\text{k}\Omega$ is connected across the $200\,\text{k}\Omega$ resistor, as in the diagram, what reading will the voltmeter show?
- A$12\,\text{V}$
- B$15\,\text{V}$
- C$20\,\text{V}$
- D$30\,\text{V}$