SOLUTION: Ed goes on a car journey. the first 60 km of the journey takes 45 minutes. the remaining 20 km of the journey takes 30 minutes calculated his average speed in kilometres per hour f

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Question 952348: Ed goes on a car journey. the first 60 km of the journey takes 45 minutes. the remaining 20 km of the journey takes 30 minutes calculated his average speed in kilometres per hour for the journey
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Ed goes on a car journey. the first 60 km of the journey takes 45 minutes.
the remaining 20 km of the journey takes 30 minutes calculated his average speed in kilometres per hour for the journey
:
Average for the journey = total distance /total time
Change time to lhrs: 45m = .75 hrs; 30m = .5 hrs
av = %28%2860%2B20%29%29%2F%28%28.75%2B.5%29%29
av = 64 km/h