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A stone is dropped into a well of depth 196m the splash is heard after 6.88 second find velocity of sound in air

need it immedietly please help

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The velocity will be 28.488 and rounded off will be 2.5 meters/second. To calculate velocity, you need to divide the distance by time takes (v =d/t). That means you divide 196 meters by 6.88 seconds, which is 196/6.88 and you get 28.5 m/sec.

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but i think we hear sound only after when the stone reaches the water of well ..............................i am not sure
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