Lisa flies from San Francisco to New York (2500 mi) in 5 hours and then flies from New York to Rome (3487.5 mi) at 465 mph. What is the average speed for her entire trip?
+37146 Get the total distance sum then divide by the total time sum
Rome time 3487.5 m / 465 m/hr = ........ hr
total distance / total time = avg
