On the descent of an airplane from an altitude of 2.5 km the airfield (A) as well as a football ground (B) in the same line with the airfield are viewed by the pilot. It is noted the angles of depression of the airfield and the football ground are 290 and 420 How far is it from the airplane to the football ground? km How far is the airfield from the football ground? km 42 29 D 2.5 Km 290 420 A X B y C