Final answer:
The plane's velocity is calculated by dividing the distance traveled by the time taken, resulting in a velocity of 72.3 km/h [SE].
Step-by-step explanation:
The formula to calculate the velocity of a plane is velocity = distance / time. In this particular scenario, the plane traveled a distance of 376 kilometers in a time span of 5.2 hours. To determine the velocity, we can divide the distance traveled by the time taken:
Velocity = 376 km / 5.2 h
After performing the calculation, we find that the velocity is approximately 72.30769231 kilometers per hour. Rounding this value to a common level of precision, we can conclude that the plane's velocity is approximately 72.3 kilometers per hour. It is important to note that this value represents the average velocity over the given time period.