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

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

Quizplus · Accepted Answer

When an airplane flies into a headwind, its groundspeed is reduced by the speed of the wind. Therefore, with a 10 km/h headwind, the airplane's groundspeed would be 100 km/h - 10 km/h = 90 km/h.

An Airplane Flies at 100 Km/h in Still Air