Question

In a submarine fitted with a SONAR, the time delay between generation of a signal and reception of its echo after reflection from an enemy ship is observed to be $73.0$ seconds. If the speed of sound in water is $1450 m^{s –1}$ , then calculate the distance of the enemy ship.

Answer 1

we will use the formula 2d=v*t
where v= velocity of SONAR in water
t= time taken.
2d=1450*73105850m
2d=105805m
d=105850/2
d=52925m=52.925 km

Answer 2

the distance of enemy ship is 52.925