19. A salesperson drove north 224 km from Minnehaha to Yellville. He then turned around and drove back south for 249 km to Mount Carmel. The total trip took 5 hours What was the salesperson's average velocity for the entire trip?
"Round your answer to two decimal places if necessary
0 -0.69 km per hour
O 5 km per hour
0 5.72 km per hour
2.56 km per hour
O None of these is correct