Question: A stone is dropped into a well with no initial velocity and 4.5 sec later the splash is heard. Then a second stone is

A stone is dropped into a well with no initial velocity and

A stone is dropped into a well with no initial velocity and 4.5 sec later the splash is heard. Then a second stone is thrown downward into the well with an initial velocity Vo and the splash is heard in 4 sec. If the velocity of sound is constant at 336 m/s, the initial velocity of the second stone (in m/s) is

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