Two heavy balls are released from different heights, one 2.34 s after the other. If the two balls hit the ground at the same time, 4.0 s after the first is released, from what heights were they dropped?

the drop height is ... 1/2 g t²

the times are ... 4 s
... and (4 - 2.34) s

g is ... 9.81 m/s²

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