The angle of elevation of a jet plane from a point A on the ground is 60°. After a flight of 20 seconds at the speed of 432 km/hour, the angle of elevation changes to 30°. If the jet plane is flying at a constant height, then its height is:
1
1200√3 m
2
1800√3 m
3
3600√3 m
4
2400√3 m
5
Question Not Attempted