# Waves problem

The velocity of the transverse waves produced by an earthquake is $$8.9 \text{ km s}^{-1}$$, and that of the longitudinal waves is $$5.1 \text{ km s}^{-1}$$. A seismograph records the arrival of the transverse waves 68 seconds before the arrival of the longitudinal waves. How far is the earthquake? (in km)

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