Question
A relief aeroplane is flying at a constant height of 1960 m with speed 600km/hr above the ground towards a point directly over a person struggling in flood water (see fig.). At what angle if sight, should the pilot release a survival kit if it is to reach the person is water? (g = 9.8 m/s^{2})

None of these



medium
Solution
As the plane is flying at a speed of 600 × (5/18), i.e., (500/3) m/s horizontally (at a height of 1960 m above the ground), the time taken by the kit to reach to ground
And in this time the kit it move horizontally by
So the angle of sight
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