A man standing at a point on the line joining the feet of two cliffs fires a bullet . If he hears the `1^(st)` echo after 4 seconds and the next after 6 seconds , then what is the distance between the two cliffs ? (Take the velocity of sound in air as `330 m s^(-1)`)

Explanation

(i) `V = (2d)/(t)`
(ii) Apply the formula d = Vt for both the cliffs.
Then add the two distances to get the distance between the two cliffs.
(iii) 1650 or 1.65 km .