A man is swimming at a depth d in a sea at a distance `L (gt gt d)` from a ship (S). An explosion occurs in the ship and after hearing the sound the man immediately moves to the surface. It takes 0.8 s for the man to rise to the surface after he hears the sound of explosion. 0.2 s after reaching the surface he once again hears a sound of explosion. Calculate L.

Give: speed of sound in air `=340 ms^(-1)`, Bulk modulus of water `=2xx10^(9) Pa`

Answer

447.6 m