Asked by Jac

An oceanic depth-sounding vessel surveys the
ocean bottom with ultrasonic waves that
travel 1530 m/s in seawater.
How deep is the water directly below the
vessel if the time delay of the echo to the
ocean floor and back is 7 s?
Answer in units of m.
plz help and explain
Answered by Steve
speed = distance/time

so, what is the round-trip distance?