An echo is returned in 6 seconds. What is the distance of the reflecting surface from source.

An echo returned in 3 s. What is the distance of reflecting surface from the source ? Given that the speed of sound is 342 ms^ -1 .

An echo is heard after 4s. What is the distance of reflecting surface from the source, given that the speed of sound is 342 ms^-1 .

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day ?

A ship produces ultrasonic sound which is collected in 3.42 s after reflection from the surface of sea. If the velocity of ultrasonics is 1531ms^-1 , then what is the distance of sea surface from sea ?

A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water. In a submarine equipped with a SONAR the time delay between generation of a probe wave and the reception of its echo after reflection from an enemy submarine is found to be 77.0 s. What is the distance of the enemy submarine? (Speed of sound in water = 1450 m s^-1 ).