The angle of elevation of an aeroplane from a point on the g

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SSC CGL Tier-2 20-February-2018 Maths
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55

M: +3.00/-0.00

The angle of elevation of an aeroplane from a point on the ground is 60°. After flying for 30 seconds, the angle of elevation changes to 30°. If the aeroplane is flying at a height of 4500 m, then what is the speed (in m/s) of aeroplane?

[SSC CGL Tier-2 20-February-2018 Maths]

A 50√3

B 100√3

C 200√3

D 300√3