Physics
posted by Pat .
A ball is thrown horizontally from a platform so that the initial height of the ball is 6.0 m above the level ground below. The ball lands 24 m from its original horizontal location. Find how fast the ball was thrown.
Show work i just don't understand

how long does it take to fall 6 m.
h=1/2 g t^2
t=sqrt (2*6/9.8)
velocity=24/time
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