In an action movie, the villain is rescued from the ocean by grabbing onto the ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase of counterfeit money when he is 130above the water.

Question

In an action movie, the villain is rescued from the ocean by grabbing onto the ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase of counterfeit money when he is 130above the water.
If the briefcase hits the water 6.0 later, what was the speed at which the helicopter was ascending?

I found the distances (176.4 m) that the suitcase falls from, but I can't find the acceleration, final velocity, or time.