The wavelength ($\lambda$), frequency ($\nu$), and speed of light ($c$) are related by the equation: $c = \nu \lambda \Rightarrow \lambda = \frac{c}{\nu}$

1. Identify Given Values: Frequency ($\nu$) = $1368 \text{ kHz} = 1368 \times 10^3 \text{ s}^{-1}$ (or Hz) Speed of light ($c$) = $3.0 \times 10^8 \text{ m s}^{-1}$

2. Calculate Wavelength ($\lambda$): $\lambda = \frac{3.0 \times 10^8 \text{ m s}^{-1}}{1368 \times 10^3 \text{ s}^{-1}}$ $\lambda = \frac{3000 \times 10^5}{13.68 \times 10^5} \text{ m}$ (Adjusting powers for easier division) $\lambda = \frac{3.0 \times 10^8}{1.368 \times 10^6} \text{ m}$ $\lambda = 219.298... \text{ m}$

3. Rounding: Rounding to one decimal place, $\lambda \approx 219.3 \text{ m}$.