An airplane that flies at 100 km/h in a 100-km/h crosswind has a ground speed of
A)0 km/h.
B)100 km/h.
C)141 km/h.
D)200 km/h.

Question

Quizplus · Accepted Answer

The ground speed of an airplane in a crosswind can be calculated using the Pythagorean theorem where the horizontal component is the airplane's airspeed, and the vertical component is the wind speed.

Ground speed = √(air speed² + wind speed²)

In this scenario, the airspeed is 100 km/h, and the crosswind is also 100 km/h. Therefore, the ground speed is:

Ground speed = √(100² + 100²) = √(20000) = 141.4 km/h (rounded to the nearest tenth)

Hence, the correct answer is C) 141 km/h.

An Airplane That Flies at 100 Km/h in a 100-Km/h