The combined speed of the plane and the wind is 249.35 km/h.
<h3>Relative speed</h3>
The relative speed of the plane due to speed of the wind is calculated as follows;
Let the direction of the plane be horizontal direction.
<h3>Speed of the wind</h3>The speed of the wind is calculated as follows;
The combined speed of the plane and the wind is calculated as follows;
V = 275 km/h - 25.65 km/h
V = 249.35 km/h
Thus, the combined speed of the plane and the wind is 249.35 km/h.
Learn more about relative speed here: brainly.com/question/17228388