We drop a stone into a deep borehole. We hear the down arriving stone's
knocking 7,7 seconds after the dropping. (The voice's velocity is 340
m/s) How deep is the borehole?
distance = speed x time
distance = depth of the boreholespeed = speed of sound = 340m/stime = 7.7 sectherefore, depth of borehole = 340x7.7 meters = 2618 meters.there you go.Regards,Ravi
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