Mathematics · Trigonometry
The angle of elevation of a jet plane from a point A on the ground is 60°. After a flight of 20 seconds at a 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:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12400√3 m
- 23600√3 m
- 31800√3 m
- 41200√3 m✓
Correct answer
1200√3 m
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