2. The angles of elevation of the top and bottom of a flagstaff, on the top of a building, as seen by an observer on the ground below are \( 60^{\circ} \) and \( 45^{\circ} \) respectively. Find the height of the flagstaff if the distance of the observer from the building is \( 30 m \). Find also the height of the building.
3. A man standing \( 60 m \) away from a building observes that the angles of elevation of the ton and hottom of
