A bat is flying toward a cave wall. If it hears reflected sound of frequency 60.9 kHz, what is its flying speed, assuming it emits sound at 52.0 kHz? The speed of sound is 341.5 m/s.
A. 25.9 m/s
B. 28.1 m/s
C. 49.9 m/s
D. 26.9 m/s
E. 58.4 m/s
D. 26.9 m/s
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