Question

An ultra sound equipment installed at a height of 80 m/s above sea water surface sends out ultrasound that returns from the sea water is 1500m/s and that through air is 320m/s then the depth of sea at that place is?

Answer 1

I think u should correct the units to make the question more clear. There are a lot of mistakes. So correct them so that I may be able to answer

Answer 2

Time taken by ultrasound to reach the sea bed = 5.4/2= 2.7s

Now Distance=Speed×time

So time=D/S

Time taken to cross air = 80/320=0.25s

Time of ultrasound in sea =2.7-0.25= 2.45s

D=S×T

Depth of sea =speed of sound in sea×time

1500m/s×2.45s=3675m

Hope ,that it may be helpful to you.