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Car a and car B travel from a and B at the same time. Car a travels 80 kilometers per hour, while car B travels 60 kilometers per hour. When the two cars meet, it is 40 kilometers away from the midpoint of the whole journey. How long is the whole journey?
(40 × 2) △ 80-60) × (80 + 60), = 80 △ 20 × 140, = 4 × 140, = 560 (km), a: the whole journey is 560 km long
Car a travels 40 kilometers per hour, and car B travels 60 kilometers per hour. The two cars start from a and B at the same time and go opposite each other. At 3 o'clock after meeting, car a arrives at B. find the distance between a and B
A: the distance between a and B is 200 km
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