Ball dropped from roof passes 3 m window in 0.25 s

[tuckingfypoz]

Fairly Simple Problem help... kinda urgent

a ball is dropped off the roof of a building and passes a 3 meter window in a quarter of a second. How high is the roof from the top of the window?

 

[StatusX]

Set the distance to the window to some unknown h and calculate the time it would take to fall to h, the time it would take to fall to h-3, and solve for h given this difference is 1/4 second.