1. Formula for speed is: Speed = Distance/Time

2. Distance is given = 120 miles

3. Calculate time of travel (10:32 - 10:20)

4. Divide that into distance

5. This gives you miles/minute

6. There are 60 minutes in an hour, so multiply last answer by 60 to convert ot miles per hour

2. Distance is given = 120 miles

3. Calculate time of travel (10:32 - 10:20)

4. Divide that into distance

5. This gives you miles/minute

6. There are 60 minutes in an hour, so multiply last answer by 60 to convert ot miles per hour