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The distance between the two places is 480 kilometers. The two cars run from the two places at the same time and meet four hours later. It is known that the speed ratio of the two cars is five to three. How many kilometers do the two cars travel per hour
The relative total velocity is 480 / 4 = 120km / h
So the speed of a is 120 * 5 / 8 = 75
B's speed is 45
The distance between a and B is 720 meters. The two passenger and freight cars leave from the two places and meet each other in 3.6 hours. It is known that the speed ratio of passenger and freight cars is 3:2
How far is it?
The speed ratio of passenger and freight cars is 3:2, and the common ratio is K
Bus speed = 3K
Speed of truck = 2K
3k+2k=720/3.6
5k=200
k=40
Bus speed = 3K = 3 * 40 = 120m / h
Speed of freight car = 2K = 2 * 40 = 80m / h
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