A stone dropped from the top of a tower of height 300 m high splashes – InterviewSolution

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1.	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» 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`

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