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Jimmy and his family are on their way to visit some family friends who live 780 miles away from them. Based on the route they chose, they expect to complete their trip in three days. The distances and average speeds for the first two days driven are shown below. • First day: 4 hours at an average speed of 60 miles per hour • Second day: 6 hours at an average speed of 65 miles per hour If the average speed on the third day is 60 miles per hour, how many more hours will it take for them to reach their family friends’ home?

Sagot :

zaralovey221

Answer:

If they drive an average of 60 miles per hour the last day it will take them 2.5 hours.

4 hours at 60 miles per hour = 4*60 = 240 miles

6 hours at 65 miles per hour = 6*65 = 390 miles

This is a total of 630 miles.  There are 780-630=150 miles left; if they average 60 miles per hour, that would be 150/60 = 2.5 hours.

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