A stone dropped from the top of a tower of height 300 m high splashes into the water of a pong near the base of the tower. When is the splash heard at the top ? Given that the speed of sound in air is `340ms^(-1)? (g=9.8ms^(-2)`.

Answer

`8.707 s`

Explanation

`h=(1)/(2)g t_(1)^(2)rArr t_(1)=sqrt((2h)/(g))and h=vt_(2),t_(2)=(h)/(v)=(300)/(340)`
`:. t=t_(!)+t_(2)=8.707 sec`