How do you find displacement if you know velocity, acceleration, and time?

It is better to teach someone how to fish than to be taught how to fish.

Displacement = initial velocity x time 0.5x acceleration x time squared. (If it is decelerating, use a minus sign)

Acceleration = final velocity-initial velocity)/time.

Another point to note regarding this topic is that any law is only valid within a certain range. If you use it beyond this range, it will be a joke.

The specific answer to this question is: 18m