posted by Ashley .
The velocity of the transverse waves produced by an earthquake is 8.9 km/s, and that of the longitudinal waves is 5.1 km/s. A seismograph records the arrival of the transverse waves 68 s before the arrival of the longitudinal waves. How far away was the earthquake?
Subtract the fast wave arrival time from the slow wave arrival time.
d/5.1 - d/8.9 = 68
Solve for d.