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The speed ratio of a and B is 7:9, and a runs 72km less than B when they meet, How many kilometers per hour do a and B cars travel?
Speed difference = 72 △ 6 = 12 km / h
A = 12 △ (9-7) × 7 = 42 km / h
B speed = 42 + 12 = 54 km / h
The speed ratio of car a and car B is 7:9 when they meet after 6 hours. The speed ratio of car a and car B is 72 km less than that of car B when they meet,
How many kilometers per hour does car a and car B travel?
The speed ratio of a and B is 7:9, the travel time is equal, and the distance ratio is 7:9
The encounter is that a travels 72 km less than B, corresponding to two less walks
72÷2=36
A: 36x7 = 252km
B: 36x9 = 324km
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