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