A stone is dropped into a well in which water is 78.4m deep. After how long will the sound of splash be heard at the top ? Take velocity of sound in air `=332ms^(-1)`.

A stone is dropped into a well 44.1 deep. The sound of splash is heard 0 . 13 seconds after the stone hits the water. What should be the velocity of sounds in air .

A stone is dropped into a well 45 m deep. The sound of the splash of the splash is heard 3.13 s after the stone is dropped. Find the speed of sound in air. Take g = 10 m//s^2 .

A stone is dropped into a well in which the level of water is H metre below the top of the well. If v is velocity splash is heard will be given by

A stone is dropped into a lake from a tower 500 metre high. The sound of the splash will be heard by the man approximately after