An airplane pilot wishes to fly directly westward. According to the weather bureau, a wind of 75.0 Km/h is blowing southward. The speed of the plane relative to the air (called the air speed) as measured by instruments aboard the plane is 310Km/h. In which direction should the pilot head? In this particular problem, you can compare the speed of the plane relative to the ground (the ground speed) to known quantities to evaluate the reasonableness of your answer. Find the ground speed of the plane,Vp/G .