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A and B leave from ab at the same time, and they meet at 2 hours. After meeting, they continue to move on A and B leave AB at the same time and meet each other in two hours. After meeting, the two cars continue to move forward. When a car arrives at B, B is 90 kilometers away from A. It is known that the speed ratio of a and B is 3:2. How many kilometers does a and B travel per hour
The speed ratio of Party A and Party B is 3:2, and the distance of Party B is 2 / 3 of that of Party A in the same time
Therefore, when a arrives at B, B takes 2 / 3 of the whole journey, and the whole journey is 90 (1-2 / 3) = 270 km
A's speed: 270 △ 2 * 3 / (2 + 3) = 81 km / h
Speed of B: 270 △ 2 * 2 / (2 + 3) = 54 km / h
Car a and car B leave 480 kilometers away from each other at the same time, and they meet on the way after 4 hours. It is known that the speed ratio of car a and car B is 11:13. How many kilometers do car a and car B travel per hour?
A 55 km / h
B 65km / h
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