Answer:
Average velocity = 360km/h due Northeast.
Step-by-step explanation:
Given the following data;
Distance = 1260km
Time = 3.5h.
Velocity =?
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;


Substituting into the above equation;

Velocity, V = 360km/h.
Since velocity is a vector quantity, it must have both magnitude and direction.
Hence, the average velocity of the airplane is 360km/h due Northeast.