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Help The speed of sound in water is 1,500. m/s. Suppose a sound wave is transmitted through water from one submarine, is reflected off another submarine 15 km away, and returns to the sonar receiver on the first submarine. What is the round-trip transit time for the sound wave? s = v t 1 km = 1000 m t = s / v 15 km * ( 1000 m / 1 km) = 15000 m t = 15000 m / 1500 m/s t = 10 s supposedly this answer is wrong

Verified Answer :

AL2006


You correctly calculated the time it takes the sound to go from the
first submarine to the second one.  The question is asking how long
the complete round-trip takes, that is, how long it takes for the first
submarine to hear the echo. So the total distance is 30km.

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