A sonar device on a ship sends ultrasound waves under the water to locate a submarine. It takes the ultrasound wave 5 seconds to travel from the device to the sunken submarine and back
again. How far below the surface is the sunken submarine? (Be sure to use the proper units of
measure) * 5

3750 m

Explanation:

We must first know the speed of sound in water in order to solve this problem.

So, speed of sound in water = 1500 meters per second

Now time taken = 5 seconds

Given that;

v = 2x/t

where x is the distance below;

vt = 2x

x = vt/2

x = 1500 * 5/2

x = 3750 m

b is the correct answer

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