1B.A boy standing on a horizontal plane finds a bird flying at a distance of 100 mi from him at an4elevation of 30 . A girl standing on the roof of 20 metre high building, finds the angle of elevation ofthe same bird to be 45". Both the boy and the girt are on opposite sides of the bird. Find thedistance of bird from the girl.

1B.A boy standing on a horizontal plane finds a bird flying at a dista

1.	1B.A boy standing on a horizontal plane finds a bird flying at a distance of 100 mi from him at an4elevation of 30 . A girl standing on the roof of 20 metre high building, finds the angle of elevation ofthe same bird to be 45". Both the boy and the girt are on opposite sides of the bird. Find thedistance of bird from the girl.
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