Solve the following question given below:
Question: P and S waves from an earthquake travel at different speeds, and this difference helps locate the earthquake "epicenter" (where the disturbance took place).
Part A: Assuming typical speeds of 8.5 km/s and 5.5 km/s for P and S waves, respectively, how far away did the earthquake occur if a particular seismic station detects the arrival of these two types of waves 1.9min apart?
x=____km?
Show how you get the answer for the above question, so that I can better understand how to do it.