Engineering Board Exam Reviewer · Solutions to Oblique Triangles · hard
Two observers A and B, 500 m apart on a level road, see an airplane in the vertical plane through them. The airplane is on the same side of both observers, with B nearer to it. The angles of elevation are 40° at A and 70° at B. Find the height of the airplane in meters.
- 939.69
- 604.02
- 321.39
- 1373.74
Answer
B. 604.02
Solution
In triangle ABP: A=40°, ABP=180°-70°=110°, so P=30°. AP=500 110°/ 30°=939.69 m and h=AP 40°=604.0 m.
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