You run to campus to make it on time for your Physics 2

Last updated: 7/31/2022

You run to campus to make it on time for your Physics 2 class. The lecture hall is 1 mile from your dorms. You run at the speed of 4 miles per hour to your class. The class lasts 1.5 hours. After, you go straight back to your dorm. However, you are tired so you walk with a speed of 2 miles per hour. What is your average speed at the time interval you left the dorms and you came back. 1 miles/hour 0 miles/hour 0.9 miles/hour 3 miles/hour 1.7 miles/hour