The average speed that she was traveling is the average distance covered per unit time during the trip.
![\text{Average speed}=\frac{Average\text{ distance}}{\text{total time taken}}](https://img.qammunity.org/2023/formulas/mathematics/college/tppryg4e15vflv5mr8dkf8rajs9nfg4ar0.png)
Given;
Average distance covered = 120 miles
Total time taken = 3.35 hours
Substituting the given values into the equation.
![\begin{gathered} \text{Average speed }=(120)/(3.35)\text{ miles per hour} \\ \text{Average speed }=35.82\text{ mph} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/x0xzcuzq1p7kh46o9tx8vi05ysj9godixv.png)
The average speed that she was travelling is 35.82 mph