일반물리학 1 — Motion in Two and Three Dimensions: Problem 76

76 A light plane attains an airspeed of 500 km/h. The pilot sets out for a destination 900 km due north but discovers that the plane must be headed 20.0° east of due north to fly there directly. The plane arrives in 2.00 h. What were the (a) magnitude and (b) direction of the wind velocity?