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A and B drive from city a to city B at the same time. When car a runs 40% of the whole journey, car B runs 18 kilometers; when car a arrives at city B, car B runs 18 kilometers, A and B drive from a city to B city at the same time. When a car runs 40% of the whole journey, B car runs 18 kilometers; when a arrives at B city, B car still has to travel 9 kilometers to get there. How many kilometers is the distance between a and B city?
The speed of Party A and Party B remains the same. When Party A runs 40% of the whole journey, Party B runs 18 kilometers
18 △ 40% = 18 × 100 / 40 = 45 km, then 45 + 9 = 54 km is the distance between AB and ab
A: the distance between the two places is 54 km
A and B leave from a and B. when a runs two fifths of the whole journey, B runs 18 kilometers. When a arrives at B, B is still 9 kilometers away from B. how many kilometers are there between a and B?
When car a travels two fifths of the way, car B travels 18 kilometers,
So when Party A takes 5 / 5 of the whole journey (the whole journey), the distance of Party B is:
18 × 5 / 5 △ 2 / 5 = 45 km
The distance between a and B is:
45 + 9 = 54 km
A: A and B are 54 kilometers apart
A and B drive from place a to place B at the same time. When car a runs half of the whole journey, car B is 60 kilometers away from place B. when car a reaches place B, car B runs the whole journey
How many kilometers are there between a and B?
We need a detailed formula
A and B drive from a to B at the same time. When a runs half of the whole journey, B is 60 kilometers away from B. when a reaches B, B runs 80% of the whole journey. How many kilometers are there between a and B?
When car a arrives at B, car B runs 80% of the whole journey
Then the speed of car B is 80% of that of car a
60÷（1-1/2×80%）
=60÷（1-40%）
=60÷60%
=100 km
A and B start at the same time from AB and run in opposite directions. A runs 48 kilometers per hour, B 42 kilometers per hour, when B reaches% 2
When car B reaches 7 / 20 of the whole journey, car a is still 24 kilometers away from the midpoint. How many kilometers is the distance between two places?
A: B = 48:42 = 8:7 speed ratio
Speed ratio = distance ratio at the same time
So: A: 7 / 20 = 8 / 7
A = 8 / 20 the distance a has completed
1-8/20=12/20 =24
Therefore, the total length is 24 * 20 / 12 = 40
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