Physics Kinematics Help

d = ViT + 1/2 at^2

6 = 11 (T) + 0.5 (-6.0) (T)^2
11T + -3.0T^2 - 6 = 0
-3.0T^2 + 11T - 6 = 0

Then use quadradic equation.
You should get 2 answers since it passes it at two times. If you get no answers then it never reaches 6m [S].

I got 0.4821 seconds. Anyone want to double check?

USe the link I sent you. Use the bottum formula to find the final velocity then use the middle formula to find the time.