A stone dropped from the top of a tower of height 300 m high splashes into the water of a pond 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)`).

Explanation

Time taken by the stone to reach the water of pond `t_(1)=sqrt((2h)/(g))=sqrt((2xx300)/(9.8))=7.825s`
time taken by splash of sound `t_(2)=("distance")/(velocity")=(300)/(340)=0.882a`
`therefore` Total time `t=t_(1)+t_(2)=7.825+0.882=8.707s`