alleryStart learning →A person shouts near a cliff 66 m away. With sound speed 330 m/s, the echo returns after
A0.2 s
B0.8 s
C0.1 s
D0.4 s
Answer & Solution
Correct answer: D. 0.4 s
The sound travels 2 x 66 = 132 m, and 132/330 = 0.4 s.
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