- A250√3 m
- B500 m
- C500√3 m
- D250 m
Step-by-Step Solution
h cot 60° + h cot 30° = 1000, i.e. h(1/√3 + √3) = 4h/√3 = 1000, so h = 250√3 m ≈ 433 m.
Answer: A) 250√3 m
Two observers A and B stand 1 km apart on a level road. A plane directly above the road between them is seen at elevations of 60° from A and 30° from B. How high is the plane?
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