It took 2.5 hours for the bus to travel the distance between two cities at a velocity of 75.0 miles/hr. how many miles lie between the two cities?

Velocity of the bus = 75 miles/hr
Time taken by the bus to travel the distance between two cities = 2.5 hours
Let us assume the distance between the two cities = x
Then
Velocity = Distance/Time taken
Then Distance = Velocity * Time taken
                         = 75 * 2.5 miles
                         = 187.5 miles.
The distance between the two cities is 187.5 miles.I hope this answer is what you were looking for. This process is applicable for similar problems. In future you can always use this method to determine the answer.