Question

A ship equipped with a sonar produces an ultrasonic sound wave. The wave took 2 s to reach the receiver after being reflected by a sunken ship directly below it. If the velocity of waves in sea water is 1450 m/s, find the depth at which sunken ship is located.

• A. 2900 m
• B. 1450 m
• C. 2800
• D. 3000

Answer 1

The correct option is B

1450 m

Given, velocity of sound in water V = 1450 m/s

The time interval between the production and reception of the wave $t=2.0s$

Let, $d$ be the depth at which sunken ship is located.

So, the total distance travelled by the sound wave is $2d$

We know, $distance=speed\times time$

$⟹2d=Vt$

$⟹d=\frac{Vt}{2}$

$⟹d=\frac{1450\times 2}{2}$

$⟹d=1450m$