a car takes 40 min to travel the first 60 km 1 hour and 30 minutes for the next 100 KM and then 20 min to travel and another 15 km find the average speed of the car in the whole journey.
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Answer:
- 1.5
- 3.3
- 0.75
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the answer is 70km/h but i don't know how to solve
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