Answer
644 km/hr
Work Step by Step
To find the speed we need to find the total distance (not displacement as we did previously) and divide it by the total time the plane flew, which is the same 2.25 hr. To find the total distance we need to add the distances traveled during each leg of the flight. In the first leg, the plane flew 483km and in the second it flew 966km for a total of 1449km. These 1449km were flown in 2.25hr, which gives 1449km/2.25hr = 644km/hr
