Answer to Question #239820 in Physics for Tina

Question

You normally drive on the freeway at an average speed of 105 𝐾𝑃𝐻 between San Diego and Los Angeles that takes 2ℎ and 20 𝑚𝑖𝑛. However, on a Friday afternoon, heavy traffic slows you down, and you drive the same distance at an average speed of only 70 KPH. How much longer does the trip take?

Answer 1

$$\Delta t=t_2-t_1\\\Delta t=\frac{105}{70}\frac{120+20}{3}-\frac{120+20}{3}=23\ min$$