Question

A submarine sends a signal and receives an echo after 5 seconds. Calculate the speed of sound if distance of object from submarine

in 3625m.

Answer 1

distance of d object frm submarine = 3625m
time taken = 5/2

then speed = 3625/5/2. (speed = distance /time)
=> 1450m/s


seldon.

Answer 2

`speed = distance / time`
Since the sound travels from the submarine to the object AND back, it actually travelled 3625x2=7250m.


`7250 / 5 = 1450`
Speed of sound: 1450m/s