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The two cars run from a and B for 5 hours. The distance ratio is 3:2. How many hours does it take to finish the whole journey?
The distance ratio is 3:2
The speed ratio is 3:2
A walked 3 / 5 of the way
It takes 5 △ 3 / 5 = 25 / 3 hours to complete
B walked two fifths of the way
It takes 5 △ 2 / 5 = 25 / 2 hours to complete
A and B drive from a to B at the same time. When a runs 50% of the whole day, B is 54 kilometers away from B. when a arrives at B, B runs 80% of the whole day. How many kilometers are there between the two places?
135 km, give points first and then write the process
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