The distance between a and B is 480 kilometers. A and B start from the two places at the same time and run in opposite directions. They meet three hours later. The speed ratio of a and B is 9:7. How many kilometers does a and B travel in each hour?

(480 △ 3) × 99 + 7 = 160 × 916, = 90 (km / h). 480 △ 3-90 = 160-90, = 70 (km / h). Answer: car a travels 90 km per hour, car B travels 70 km per hour

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