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?
Originally, the speed ratio of Xiaohong and Xiaoqiang was 52:70 = 26:35, then Xiaoqiang walked the whole course of 3561 when they met; later, the speed ratio of Xiaohong and Xiaoqiang was 52:90 = 26:45, when they met, Xiaoqiang also walked the whole course of 3561, then Xiaohong walked the whole course of 3561 × 2645 × = 18 after Xiaoqiang started
RELATED INFORMATIONS
- 1. 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?
- 2. 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?
- 3. 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
- 4. In the drawing with scale of 100:1, the length of the part is 4cm, and the actual length of the part is calculated
- 5. 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
- 6. Yao Ming's height in the photo is 5cm, and his actual height is 2.29M. What's the scale of this photo______ .
- 7. 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
- 8. Divide a 3 / 4 meter long rope into 5 parts, each part is () meters, and each part accounts for a fraction of the total length. The product of 7 and 11 is a fraction of the minimum four digits I really have to go
- 9. Divide the 3-meter-long wire into 5 parts, each part is long______ Meters, each of which accounts for 50% of the total length______ .
- 10. On the school plan with a scale of 1:100, the width of a teacher is 6cm, and the ratio of length to width is 4:3. What is the actual area of this classroom?
- 11. 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)
- 12. 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
- 13. 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?
- 14. 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?
- 15. 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
- 16. Congcong made a round greeting card for her teacher with colored cardboard. In order to be beautiful, she bought a colored rope to stick it to the outside of the card. The card shared 31.4cm colored rope. Do you know how many square centimeters of colored cardboard she used? Come on. Give me the answer in 6 minutes
- 17. Xiao Li is 27 years younger than her mother, and her father is 4 years older than her mother. The total age of the three is 82. How old is Xiao Li this year
- 18. The reason of enjoying cool under big trees is explained by transpiration
- 19. The reason why it is good to enjoy the cool under the big trees is that: (1) The big tree has a big crown and a big shade (2) During the day, the air under the big trees is fresh because (3) In hot summer, the air under big trees is wetter and cooler than other places. The reason is that
- 20. It's good to enjoy the cool under the big trees. The destruction of a thousand mile dike in an ant colony shows that organisms and the environment interact with each other?