Police chased a suspect vehicle for 150 miles traveling at a speed of 75 miles per hour. After apprehending the suspect, they made the same trip back...

Police chased a suspect vehicle for 150 miles traveling at a speed of 75 miles per hour. After apprehending the suspect, they made the same trip back to the police station at 50 miles per hour. What was the average speed the squad car was traveling for the entire trip?