Answer:
D 776 m.
Step-by-step explanation:
Use trigonometry. The line of flight of the plane, it's height above the ground and the distance travelled along the ground form a right angled triangle.
So sin 15 = opposite side / hypotenuse.
sin 15 = h / 3000 where h = its height..
h = 3000 sin 15
= 776 m.
