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A and B set out from a and B at the same time at a uniform speed, and they went towards each other. The place where they met for the first time was 4km away from A. after they met, they continued to move forward, went to each other's starting point and immediately returned. They met for the second time at 3km away from B, and calculated the distance between the two meeting places
4 × 3 - 3 = 12 - 3, = 9 (km); 9 - 4 - 3 = 2 (km); a: the two places are 2 km apart
A and B set out from a and B at the same time at an even speed. They were walking towards each other. The place where they first met was 3 kilometers away from A. after meeting, they continued to walk
Go forward, walk to the other party's starting point, return immediately, and meet for the second time at 2km away from point B. how many kilometers are there between a and B?
When they first met, Jia walked 3 kilometers,
When they met for the second time, they walked three AB distances,
A walked 3 × 3 = 9 km and was 2 km away from B,
The distance of AB: 9-2 = 7 km
The speed ratio of a and B is 7:4. After the first meeting, they continue to move forward,
After arriving at a and B, they return immediately. On the way, they meet for the second time. The second meeting point is 200 meters away from A. find the distance between a and B
Please tell me now, it's better to use proportional knowledge!
The distance between a and B is 2200 meters
A and B set out from a and B at the same time, facing each other. When they set out, their speed ratio was 3:2. After they met for the first time, a's speed increased
(next) 20%, the speed of B is increased by 30%, so when a reaches B, B is still 16 kilometers away from a, so how many kilometers are there between a and B?
The new speed ratio of the two
3×(1+20%)：2×(1+30%)=18：13
16 ÷ (18-13) × (18 + 13) + 16 = 115.2 (km)
After they met, they walked another 16 kilometers. It may be clearer to use the line diagram
You can ask me if you don't understand
The speed of car a is 75% of that of car B. the two cars leave from a and B at the same time. They run in opposite directions and meet 5000 meters away from the destination. How many kilometers are there between the two places?
The midpoint
Jiaduo walked 32 + 32 = 64 meters
The time of a's walking is 64 (56-48) = 8 hours
8（56＋48）＝832
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