The diagram illustrates a cross-sectional view of an Olympic-size swimming pool containing water. The diagram is not to scale. The water has a density of $1000\,\text{kg m}^{-3}$. What is the pressure difference between X and Y?
- A$0.35\,\text{kPa}$
- B$3.4\,\text{kPa}$
- C$21.3\,\text{kPa}$
- D$58.9\,\text{kPa}$