1.

A boy standing on a horizontal plane finds a bird flying at a distane of 100 mfrom 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.

Answer»


ANSWER :42.3 m


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