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A bird is sitting on the top of a 80 m h...

A bird is sitting on the top of a 80 m high tree. From a point on the ground, the angle of elevation of the bird is `45^(@)`. The bird flies away horizontallly in such away that it remained at a constant height from the ground. After 2 seconds, the angle

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The correct Answer is:
29.28 m/s
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