The construction of a submarine is based on:

In a submarine equipped with sonar, the time delay between the generation of a pulse and its echo after reflection from an eneny submarine is observed to be 80 sec. If the speed of sound in water is 1460ms^(-1) . What is the distance of enemy submarine?

Working and design principles of submarines are based on ….

How does a submarine work?

How does a submarine float and sink?