:!!) Earthquakes produce several types of shock waves. The most well-known are the P-waves and the S-waves. In the earth’s crust, the P-waves travel around 6.9 km/s while the S-waves move at about 4.8 km/s. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 15 s, how far away from the seismic station did the earthquake occur? Give your answer in kilometers to the first decimal place. Correct Answer 236.6 I got the correct answer but I dont know how to get it... can someone explain pleaaze?