A person rings, a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. If the sound moves with a speed of 340 m/s, how far is the wall from him?
A. 102 m
B. 11 m
C. 51 m
D. 30 m
Answer: Option C
This Question Belongs to Physics GK Chapter Wise >> Sounds Waves And Motion
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