please help me with my physical science...?

Question

a small aeroplane flies directly from point a towards point b.a 30km/h 'tail wind' blows in the same direction as the plane is headed.if the plane's normal flying speed is 150 km/h in still air,what is the speed on this trip:
a)relative to the ground?
b)relative to the air?

Answer 1

Assuming you mean by "normal flying speed" the plane's airspeed, then:

a) relative to ground, or groundspeed = 150 + 30 = 180.
b) relative to air, airspeed is 150.