Q. An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?
A) 644 m
B) 513 m
C) 171 m
D) 342 m
✔ Correct Answer: 513 m
Exam Insight
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A) 644 m
B) 513 m
C) 171 m
D) 342 m
✔ Correct Answer: 513 m
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