Q. 174.4( 60 Votes )

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.

Answer :

Given,

Time taken = 5 seconds


The time taken by ultrasound signal to travel from the submarine to the object will be half of this time:


=


= 2.5 seconds


We know that,


Speed =


=


= 1450 m/s


Therefore, the speed of sound is 1450 m/s.


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