I have Gun A with Vo of 30m/s shot upward into the air and Gun B shot towards the ground at the same Vo.

Now I know a for A is -9.8 and a for B is 9.8.

As Vo is 30m/s when it hits the ground is it 0 m/s. That is what I am not sure of.

But I did calc time on Gun A with t=V-Vo/a and get 3.06S. which is from the cliff to the top of the curve before it falls.

How long after Gun B's pellet hits the ground does Gun A's pellet hit the ground.

I know they hit the ground at the same time. as the Vo on the way down from Gun B's position is 30m.s.

The answer is 6.12s, and if I dbl the 3.06 s above I get that, but that does not make sense to me. Can someone explain.

Tks