Question

A boy standing on a horizontal plane finds a bird flying at a distance of 100 m from him at an elevation of 30 degree.A girl standing on the roof of 20 m high building,finds the angle of elevation of the same bird to be 45 degree.Both the boy and the girl are on the opposite sides of the bird.Find the distance of the bird from the girl.[30?2 m Ans.]

Answer 1

this question answer is
first we do calculate all number and answer is come
100+30+20+45+30+2=227