Here, Distance = 145 - 98 miles = 47 miles Time Taken = 45 minutes = 3/4 hours
We know, Speed = Total Distance / Time Taken
Substitute their values in to the expression : Speed = 47 / 3/4 Speed = 47*4 / 3 Speed = 188 / 3 Speed = 62.666 After round-off to the nearest tenth, it would be: 62.7