question_answer

From a point P on the ground the angle of elevation of a 30 m tall building is \[45{}^\circ \]. A flag is hoisted at the top of the building and the angle of elevation of the top of the flag staff from point P is \[60{}^\circ \]. The length of flag staff and the distance of the building from the point P are respectively:

A) 21.96m and 30m

B) 51.96 m and 30 m

C) 30 m and 30 m

D) 21.56 m and 30 m

E) None of these