Question

I dont know the ans please help me. this is from my school assignment.

An eco of sound is heard after 5 sec in a sea. Calculate the depth of sea.(velocity of sound in sea is 1500m/s)

Answer 1

Answer:

Velocity of sound in water  v=1500 m/s

Let the depth of sea be x.

The sound has to travel to the bottom of the sea and get reflected back to the ship itself, thus total distance traveled by the sound is  2x.

Time taken to hear an echo  t=1 s

So,  2x=vt

Or  2x=1500×1

⟹ x=750 m

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Answer 2

Answer:

Velocity of sound in water  v=1500 m/s

Let the depth of sea be x.

The sound has to travel to the bottom of the sea and get reflected back to the ship itself, thus total distance traveled by the sound is  2x.

Time taken to hear an echo  t=1 s

So,  2x=vt

Or  2x=1500×1

⟹ x=750 m