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A stone dropped from the top of a tower...

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)`).

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The correct Answer is:
`t_(1)=sqrt(29//g)=sqrt(2 xx 300//9.8)=7.82"second t"_(2)=300//340=0.88sec, t=8.7sec`
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