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A boy standing on a horizontal plane finds a bird flying at a distane of 100 m from him at an elevation of `30^(@)`. A girl standing on the roof of a 20 m high building finds the angle of elevation of the same bird to be `45^(@)`. Boy and girl are on the opposite sides of the bird. Find the distance of the bird from the girl.

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The correct Answer is:
42.3 m
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