e relative to the ground.
The airplane’s speed relative to the air is
77.9 km/h.
Answer in units of km/h
To find the airplane's speed relative to the ground, we need to consider the wind speed and direction.
If we assume the wind speed is given as 10 km/h, and it blows in a direction opposite to the airplane's motion, we can calculate the airplane's speed relative to the ground using vector addition.
The ground speed is the sum of the airplane's speed relative to the air and the wind speed. Given tha the airplane's speed relative to the air is 77.9 km/h and the wind speed is 10 km/h, we can calculate the ground speed using the formula:
Ground speed = Airplane speed relative to the air + Wind speed
Substituting the given values:
Ground speed = 77.9 km/h + 10 km/h = 87.9 km/h
Therefore, the airplane's speed relative to the ground is 87.9 km/h.