A man standing between two parallel cliffs and fires a gun and hears two successive echoes after 4 second and 6 second the distance between the cliffs is (Speed of sound 330 ms-1)
(a) 1600 m (b) 1650 cm (c) 1650 m (d)1590 m
See ... its option C which is 1650 m ...
bcoz... use formula---- 2 * distance = speed of sound * time taken...
do it for both 4 s and 6 sec...
you willl get 660 m and 990 metres,... add both to get total distance... ------ 1650 metres