Answer:
It covers a distance of
where symbols have the usual meanings.
Step-by-step explanation:
As shown in the figure
Let the height of aircraft be H meters above ground
Let it's horizontal flying velocity be

Using second equation of motion we can find the time it takes for the packet to reach the ground.
We have

Thus horizantal distance covered in this time =
Since there is no horizantal accleration
Thus horizantal distance it covers =
