Suppose a man stands at a distance from a cliff and claps his hands . He receives an echo from the cliff after 4 second . Calculate the distance between the man and the cliff . Assume the speed of sound to be `343 m s^(-1)`

Explanation

The time taken by the sound to come back as echo is `2t = 4 implies t = 2s `
`therefore` The distance is d = vt (`343 m s^(-1)) (2s)` = 686 m