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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Coordinate Geometry
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A bird is sitting on top of a vertical pole 20m high and its elevation from point O on the ground is 45 $^{\circ}$. It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30$^{\circ}$. Then the speed in m/s of the bird is?

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