Q. The angle of elevation of an aeroplane from a point on the ground is 60 deg. After flying for 30 seconds, the angle of elevation changes to 30 deg. If the aeroplane is flying at a height of 4500 m, then what is the speed (in m/s) of aeroplane?
A) 100√3
B) 50√3
C) 300√3
D) 200√3
✔ Correct Answer: 100√3
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