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;
![Velocity = (distance)/(time)](https://img.qammunity.org/2021/formulas/physics/high-school/6czjjp0y2k66ua9e9y1hludu2tj28w9opj.png)
![V = (d)/(t)](https://img.qammunity.org/2021/formulas/mathematics/high-school/ni91ikyk8yqc8ddnggwe1dkrxks2evp10t.png)
Substituting into the above equation;
![V = (1260)/(3.5)](https://img.qammunity.org/2021/formulas/physics/high-school/9elm7yzfj7ayxhnsu60hf3aieragaq5nhr.png)
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.