A set of seismic waves travelling from an earthquake’s epicentre needs $100\,\text{s}$ to arrive at a location $300\,\text{km}$ distant. On reaching it, they make the ground oscillate at a frequency of $2.0\,\text{Hz}$. What is the wavelength of these seismic waves?
- A$0.67\,\text{km}$
- B$1.5\,\text{km}$
- C$3.0\,\text{km}$
- D$6.0\,\text{km}$