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A and B start from a to B at the same time. The driving speed is 50 kilometers per hour. B returns immediately after arriving at B, How many kilometers is the distance between a and B? Please analyze the meaning in detail The speed of car a is 45 kilometers per hour, and that of car B is 50 kilometers per hour. After arriving at B, car B immediately returns and meets car a 5 km away from B. how many kilometers are there between a and B?
If the condition seems to be insufficient, the distance should not be determined: suppose that the speed of vehicle B is V, the distance between two places is x, and there is {(X-5) / 50} * (V-50) = 5 * 2, then x = 500 / (V-50) + 5. It can be seen that if there is a speed of vehicle B, there will be a corresponding distance x, but the speed of vehicle B is not determined, so the distance is not determined, and there is no solution
Car a and car B are facing each other from two places. Car a starts for two hours, and car B starts for two hours before meeting car A. It is known that the distance between two places is 280 kilometers, and the sum of the speeds of car a and car B is 90 kilometers per hour. What are the speeds of car a and car B?
Who has the formula,
The distance that car a starts for 2 hours is 280-90 * 2 = 100 km;
Speed of vehicle a = 100 / 2 = 50 km / h;
B vehicle speed = 90-50 = 40 km / h;
Car a travels 60 kilometers per hour, and car B travels 50 kilometers per hour. Car a and car B drive from place a to place B at the same time. On the way, car a stops for repair for 2 hours, and then goes on. As a result, car a and car B arrive at place B at the same time. How many kilometers is the distance between a and B?
Let X. (x / 50-2) * 60 = X. the solution is x = 600
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