a bird is sitting on the top of a tree, which is 80m high.the angle of elevation of the bird on the ground is 45 degree.the bird flies away from the point of observation horizontally and remains at a constant height.after 2 seconds the angle of elevation of the bird from the point of observation becomes 30 degree.find the speed of flying bird.
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Step-by-step explanation:
29.2 m/s or 1.725 km/h
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