The angle of elevation of an aeroplane from a point on the ground is 45°. After a flight of 12 seconds horizontally, the angle of elevation changes to 30°. If the aeroplane is flying at a height of 2400 m, then find the speed of the aeroplane (in m/s).
1
2(1 + \(\sqrt3\))
2
2(\(\sqrt3 \) - 1)
3
200(\(\sqrt3 \) + 1)
4
200(\(\sqrt3 \) - 1)