Red and green balls dropped from table with opposite initial velocities

[iam911]

Homework Statement

Two balls are are released from a table top of height H = 3m at the same time. The green ball is given an initial velocity v0 = 6 m/s in the downward direction, while the red ball is given an initial velocity v0 = 6 m/s in the upward direction.
How long does it take for the red ball to reach the floor?
Which velocity would be greater when it hits the floor?

Homework Equations

v^2=v0^2+2a(x-x0)

The Attempt at a Solution

 

[Redbelly98]

Welcome to Physics Forums

Homework Equations

v^2=v0^2+2a(x-x0)

The Attempt at a Solution

There are more equations for free fall motion, other than that one. Have a look at them.

You'll want an equation that uses t, since the problem is asking for time.