A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
Solution:
Time (t) taken to hear the echo = 5 s
Distance (d) of an object from submarine = 3625 m
Total distance travelled by SONAR during reception and transmission in water = 2d
Velocity (v) of sound in water = 2d/t = (2 × 3625) / 5
= 1450 ms-1
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