Q. Ramu went his school with the speed of 60 km/hr because there were few traffic on the road but came back from the school to his home by car with the speed of 40 km /hr because of crowded road. What's the average speed of his car in the trip?
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Answer:
20km/hr
Explanation:
Distance one = 60 km
Distance two = 40 km
average speed = 60km - 40km/hr
= 20km/hr
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