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The distance ratio of big and small cars is 2:3, big cars travel 40 kilometers per hour, small cars travel how many kilometers per hour? The speed ratio of big and small cars is 2:3, small cars How many kilometers does the car travel per hour? Second question: the speed ratio of big and small cars is 2:3. How many kilometers can a car travel per hour and a big car travel per hour?
Car = 40 △ 2 × 3 = 60 km / h
The distance between city a and city B is 240 kilometers. A car travels 60 kilometers per hour from city a to city B and 40 kilometers per hour when it returns. What is the average speed of return
The last question should be "how many kilometers is the average speed of round trip"
（240×2）÷[（240÷60）+（240÷40）]
=480÷（4+6）
=480÷10
=48 km / h
A: the average speed is 48 km / h
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