Same chapter4 marksDifficulty: Hard
An aeroplane flying horizontally at a height of 3000 m is observed at an angle of elevation of 60°. After 15 seconds the angle is 30°. Find the speed of the aeroplane in km/h.
Heights and Distances
4 marksDifficulty: Hard
A tower is 100 m high. Find the angle of elevation of its top from a point 100√3 m from its foot.
Original Khojo Papers practice question — not from a past board paper.
Answer
30°
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
tan θ = 100 ÷ 100√3 = 1/√3, so θ = 30°.
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