Question

b) The speed of sound in sea water is 1600 m/s. A boat man hears an echo 3 s
after sending an ultrasonic sound into the sea. What is the depth of the sea?

Answer 1

Answer:

2400 m

Explanation:

Here, it's given that:

The velocity of sound in water or speed of sound in water(v) = 1600 m/s

Time of echo(t) = 3s

Let the depth of the sea be 'd' m

So, we know that s = d/t or d = s * t

Here, we have an echo, so the sound travels twice, once when it's emitted and then when it's interpreted after bouncing through the ocean bed.

So, 2d = s * t

2d = 1600 * 3

d = 800 * 3

d = 2400m

Thus the depth of the sea is 2400 m