Question

On their trip to Washington, DC, Jen and her parents drove 3 hours at a speed of 60 mph and then 3 hours at a speed of 40 mph. Driving back, they spent the same time. What was their driving speed on the way back?

Answer 1

50 mph

Step-by-step explanation:

Driving 60mph for 3 hours would see Jen and her parents cover

60 * 3 = 180 miles

Driving 40mph for 3 hours would see Jen and her parents cover

40 * 3 = 120 miles

The total distance covered would be;

180 + 120 = 300 miles

If they covered the same distance for the same time (that is 3 + 3 = 6 hours), then the average speed that Jen and her parents used on the way back is;

300 miles / 6 hours

= 50 mph

Learn More:

https://brainly.com/question/3733423

https://brainly.com/question/12580265

https://brainly.com/question/9164052

#LearnWithBrainly