How long does it take for a secondary wave to travel 2000km?

The speed of secondary waves (S-waves) in the Earth's crust is typically about 3 to 4.5 kilometers per second. To calculate the time it takes for an S-wave to travel 2000 kilometers, you can use the formula: time = distance/speed. For instance, at an average speed of 4 km/s, it would take approximately 500 seconds, or about 8.3 minutes, for the wave to travel that distance.