Answer:
25 m
Step-by-step explanation:
The submarine dives at angle of 30 degree with the horizontal . It has travelled 50 m at this angle . So , it will have both 25 horizontal as well as vertical displacement below the surface .
vertical displacement below the surface = vertical component of displacement of 50 m
= 50 sin30
= 25 m .
Depth of submarine below the surface = 25 m.