A person is standing at the sea shore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. the person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 `m s^(-1)`-, then calculate :

the distance between the observer on the ship and the person on the shore.

Explanation

Let d, be the distance between the observer on ship and person on shore. The first sound heard by the person at shore after `t_1 = 2 `s will be the direct sound of the fire. From relation `v = (d)/( t) , 320 = (d_1)/(2) or d_1 = 640 m`