An airplane flies at 100km/h in still air. If it flies into a 10 km/h headwind, its groundspeed is
A) 100 km/h
B) 110 km/h
C) 120 km/h
D) 90 KM/h
Answer: D
An airplane flies at 100km/h in still air. If it flies into a 10 km/h headwind, its groundspeed is
A) 100 km/h
B) 110 km/h
C) 120 km/h
D) 90 KM/h
Answer: D