The concept of an object traveling at two different speeds simultaneously is not consistent with the principles of classical physics. An object can have different velocities at different times or in different directions, but it cannot have two velocities at the same time.
Velocity is a vector quantity, meaning it has both magnitude and direction. It is calculated as the rate of change of displacement with respect to time. In the case of an object moving in a straight line, the average velocity over a given time interval is determined by dividing the change in displacement by the corresponding change in time.
If a car travels at one speed for a certain distance and then changes its speed, you would need to calculate the average velocity separately for each segment of the journey. To find the total displacement, you can sum up the individual displacements. However, keep in mind that this would not represent the actual velocity of the car at any specific moment, but rather an average value over the entire journey.
If you have specific details about the car's speeds and durations for each segment, I can help you calculate the average velocity for each segment or provide further guidance.