Answer:
11196.15 km
Step-by-step explanation:
Consider the attached diagram
If the Airplane is at point A and the floating debris at point C, we want to determine the horizontal distance |AB| before they fly over it.
Using trigonometry
[tex]Tan \alpha =\frac{Opposite}{adjacent} \\Tan 15 =\frac{3000}{|AB|}[/tex]
Cross multiply
|AB|X Tan 15 =3000
|AB| = [tex]\frac{3000}{Tan 15}[/tex] =11196.15 km
Therefore, the horizontal distance |AB| before they fly over it is 11196.15 km
