SOLUTION: A car takes 1 hour to travel 100 km along a main road and then 1/2 hour to travel 20 km along a side road. what is the average speed of the car for the whole journey? a. 60km/h

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Question 1124760: A car takes 1 hour to travel 100 km along a main road and then 1/2 hour to travel 20 km along a side road.
what is the average speed of the car for the whole journey?
a. 60km/h
b. 70km/h
c. 80km/hr
d. 100km/h
Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
.
The average speed of the car for the whole journey is  %28100+%2B+20%29%2F%281%2B0.5%29.


Use your calculator.

Or calculate it mentally.