An earthquake emits both S waves and P waves which travel at different speeds through the Earth. A P wave travels at 9 000 m/s and an S wave travels at 5000 m/s. If P waves are received at a seismic station 1.00 minute before an S wave arrives, how far away is the earthquake center?
A. 88.9 km
B. 1200 km
C. 675 km
D. 240 km
E. 480 km
Answer: C
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