Question

A sonar device on a submarine send out a signal and receives an echo 5s later. If the distance of the object form the submarine is 3625m, the speed of sound in water is?

Answer 1

2d=v×t

2 × 3625 = v × 5

v = 1450 m/s

Answer 2

Answer :

Distance(d) = 3625m

Time(t) = 5s

Speed(s) = ?

W.K.T 2d = s * t

=> d = s * t/2

=> 3625 = s * 5/2

=> s = 3625 * 2/5

=> s = 1450 m/s

Speed of sound in water = 1450m/s