Ball falling. In view for .16 seconds. From what height did it fall?

[Doggie123]

Homework Statement

A ball falls from the top of a building.
It falls past a window. It is in view for .16 seconds.
The window is 1.7 m long.
How high was the building off which it was dropped?

Homework Equations

I'm trying to use
.5 a t^2 + vt + x
but it's not working

The Attempt at a Solution

using that, I got .125, which doesn't make sense.

 

[rl.bhat]

If the ball takes t s to cross the top of the window, it takes (t + 0.16) s to cross the bottom of the window. If h is the distance of the window from the top of the building, then

h = 1/2*g*t^2 ...(1)

h + 1.7 = 1/2*g*(t + 0.16)^2...(2)

Solve the two equations to find h and t.

 

[zgozvrm]

You really can't tell how tall the building is with the information given. You can, however, tell how far the roof is above the window.