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Xiao Ming and Xiao Li start from a and B, which are 8km apart Xiao Ming and Xiao Li start from a and B, which are 8km apart, and travel in opposite directions. It is known that Xiao Li's speed is 56m / min and Xiao Ming's speed is 64M / min. how many meters less does Xiao Li walk than Xiao Ming in a few minutes?
8000 ÷ (56 + 64) = 200 / 3 minutes
Less walking (64-56) * 200 / 3 = 1600 / 3M
Xiaoming walks 30 meters per minute Xiaohua walks 25 meters per minute Xiaoli walks 20 meters per minute Xiaoming starts from a place Xiaohua and Xiaoli starts from B place at the same time and faces each other
Today!
Xiaoming walks 30 meters per minute Xiaohua walks 25 meters per minute Xiaoli walks 20 meters per minute Xiaoming starts from a place Xiaohua and Xiaoli starts from B place at the same time and faces each other. After Xiaoming and Xiaohua meet, they meet Xiaoli again five minutes later to find the distance between the two places
Let Xiaoming and Xiaohua meet at t
30t + 25t = 30（t+5）+20（t+5）
The solution is t = 50
30 × 50 + 25 × 50 = 2750m
So the distance between AB and ab is 2750 meters
Xiao Ming and Xiao Li set out from a and B at the same time and walked opposite each other. Xiao Ming walked 70 meters per minute and Xiao Li 65 meters per minute. After they met, they continued to move forward. When Xiao Ming went to B and Xiao Hong went to a, they immediately followed the same route and went back to the second meeting for 35 minutes. How far is the distance between AB and a?
(70 + 65) * 35 / 3 = 1575m
A. The distance between the two places is 36km. Xiaoli rides a bicycle from place a to place B, and Xiaoming rides a bicycle from place B to place A. they set out at the same time and walk opposite to each other. After 1h, they get together
Let Xiao Li's velocity be x and Xiao Ming's velocity be y
One hour later, they met
x+y=36/1…… ①
After another 0.5 hours, Xiaoli has (36-1.5x) km left
The rest of Xiaoming is (36-1.5y) km
According to the meaning of the title:
36-1.5y=2(36-1.5x)…… ②
The results are as follows
x=20,y=16
So the speed of Xiaoli is 20km / h, and that of Xiaoming is 16km / h
RELATED INFORMATIONS
- 1. The distance between a and B is 36 kilometers. Xiao Ming rides a bicycle from a brother to B Di, and Xiao Li rides a bicycle from B to a di They set out at the same time and walk in opposite directions. After an hour, they meet. After another 0.5 hours, Xiaoming's remaining distance is twice that of Xiaoli's. what are the speed of Xiaoming and Xiaoli's cycling? Use the equation to solve the problem
- 2. In the drawing with scale of 100:1, the length of the part is 4cm, and the actual length of the part is calculated
- 3. In a 1:1000 scale drawing, the floor area of a building is calculated to be 1 square meter, and the actual floor area is 1000 square meters Today at the latest
- 4. Yao Ming's height in the photo is 5cm, and his actual height is 2.29M. What's the scale of this photo______ ．
- 5. Cut the 4-meter-long rope into 5 sections on average. How long is each section? How many parts of the total length of each section
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- 9. Move the square with an area of 64 square centimeters on the plan with a scale of 1:250 to the plan with a scale of 100 square centimeters?
- 10. Xiao Ming drew a plan of an experimental field with a scale of 1:100. It is 5cm long and 1cm wide. How much is the actual area
- 11. Xiaohong and Xiaoqiang start from home at the same time. Xiaohong walks 52 meters per minute and Xiaoqiang 70 meters per minute. They meet at a on the way. If Xiaohong starts 4 minutes ahead of schedule and Xiaoqiang walks 90 meters per minute, they still meet at a. how many meters are Xiaohong and Xiaoqiang's homes apart?
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- 13. 1. The stamp ratio of Xiao Ming and Xiao Li is 1:4. Xiao Ming has 72 fewer stamps than Xiao Li. How many stamps does Xiao Li have 2. Suppose that the ratio of salt to water in brine is 1:9, then salt accounts for ()% (write the answer directly) 3. The scale of a part drawing is 7:1. If the length of the part measured on the drawing is 49mm, how many mm is the actual length 4. The survey team measured the height of the TV Tower and got the shadow length of 45 meters. At the same time, the shadow length of a 10 meter high column nearby was 2 meters. What's the height of the TV Tower? (to give the formula)
- 14. There are four playing cards with 10, 9, 8, 7 points. Dongdong and Jiajia touch once respectively. Who has the most points wins? Is the game fair? Please explain the reason
- 15. Xiaogang and Xiaoli jump rope. Xiaogang jumps 240 times. The number of Xiaoli is 3 / 8 of Xiaogang's. how many times did they jump together?
- 16. There are 2 yuan, 5 yuan and 6 yuan coupons in the playground. Xiaogang bought 15 coupons and spent 58 yuan. It is known that the number of 5 yuan and 6 yuan coupons is the same. Xiaogang bought 2 yuan, 5 yuan and 6 yuan coupons How many each?
- 17. Playing card game: Xiao Ming's back to Xiao Liang, let Xiao Liang operate according to the following four steps: the first step & nbsp; distribute the left, middle and right three piles of cards, each pile has the same number of cards, and no less than two cards; the second step & nbsp; take out two cards from the left pile and put them in the middle pile; the third step & nbsp; take out one card from the right pile and put it in the middle pile; the fourth step & nbsp; There are several cards in the left pile, so take a few cards from the middle pile and put them into the left pile. At this time, Xiao Ming accurately said the current number of cards in the middle pile. What do you think is the current number of cards in the middle pile? Explain your reasons
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