Answer: Trip Home. You normally drive on the freeway

Chapter 2, Problem 3E

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QUESTION:

Trip Home. You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65 mi/h), and the trip takes 2 h and 20 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 70 km/h ( 43 mi/h). How much longer does the trip take?

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QUESTION:

Trip Home. You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65 mi/h), and the trip takes 2 h and 20 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 70 km/h ( 43 mi/h). How much longer does the trip take?

ANSWER:

Step 1 of 4

The average speed (v) of an object is the total distance traveled by the object divided by the elapsed time to cover that distance.

\(\begin{array}{l}\rightarrow\mathrm{v}=\frac{\mathrm{x}}{\mathrm{t}}(*)\\ \mathrm{v}=105\mathrm{\ km}/\mathrm{h}\\ \mathrm{t}=2\mathrm{h}\ 20\mathrm{\min}\\ \mathrm{x}=??\end{array}\)

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