Question

The speed of sound in air and sea-water are given to be 340m/s and 1440m/s respectively .A ship sends a strong signal straight down and detects its echo after 1.5s.The depth of the sea at that point is

Answer 1

Depth of sea at that point- 1080 mtr

Answer 2

Speed of sound in water = 1440m per second
Time = 1.5s
Distance = 2 x depth. eq.1
let depth be 'd'
Speed = Distance/time
1440 = Distance/1.5
1440 x 1.5 = Distance
2160 m = Distance
Distance = 2 x depth from eq.1
2160 = 2 x depth
Depth = 2160/2
Depth = 1080m
Hope it helps !