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1. If the lengths of the three sides of △ ABC are root 5, root 10 and root 15, then the lengths of the two sides of △ ABC are 1 and root 2. If the length of the third side of △ a1b1c1 is_____ The results show that △ ABC is similar to △ a1b1c1 2. The lengths of the three sides of a known triangle are 1, root 2 and root 3. Please write down the lengths of the other three line segments so that the triangle formed by the three line segments is similar to the known triangle___ 、___ 、___ .
Root number 3
2, 4, 2 times root 3
It takes 10 hours for a bus to go from city a to city B, and 15 hours for a truck to go from city B to city A. the two cars leave each other. When they meet, the bus is 192 kilometers away from city B. how many kilometers is the distance between the two cities?
If the speed ratio of a and B is 110:115 = 3:2, the whole journey is 192 △ 23 + 2 = 192 △ 25, = 480 km. A: the distance between the two places is 480 km
RELATED INFORMATIONS
- 1. (1) The distance between a and B is 264 km. A takes a bus from a to B, with an average of 80 km per hour. B takes a motorcycle from B to a, with an average of 32 km per hour. When a meets B after 200 km, how many hours ahead of B? (2) A supermarket bought 100 pens at the price of 5 yuan per pen. When they were sold, they were priced at 8 yuan per pen. When some of them were sold, the remaining pens were sold at a 10% discount. When all the pens were sold, a total profit of 288 yuan was made. How many pens were sold at a 10% discount? I knelt down and begged
- 2. What does motorcycle tire size 80 / 100-14 mean?
- 3. Naughty goes to school by bike every day. The outer diameter of the bicycle tire is 60cm It takes him 8 minutes to get to school. Do you know how far the naughty home is from school?
- 4. If the wheel radius of a bicycle is 0.33 meters, the wheel rolls 100 cycles, and the bicycle advances () meters?
- 5. The length of the express train is 70 meters and the length of the local train is 80 meters. If two trains go in the same direction, the time it takes for the express train to catch up with the local train and leave the local train completely A fast train is 70 meters long and a slow train is 80 meters long. If two trains are running in the same direction, it takes 20 seconds for the fast train to catch up with the slow train and completely leave the slow train. If two trains are running in the opposite direction, the time from meeting to leaving is 4 seconds. How many kilometers per hour can the two trains travel? It must be solved by equation
- 6. 11. An express train and a local train run in opposite directions. The length of the express train is 280 meters and the length of the local train is 385 meters. It takes one hour for people sitting on the express train to see the local train How many seconds does it take for people on the local train to see the express passing?
- 7. An express train is 160 meters long, and a local train is 170 meters long. If two trains are running in opposite directions, it takes 33 seconds to catch up with the local train from the express train
- 8. The length of the fast and slow trains are 150 meters and 200 meters respectively. They run on parallel tracks in opposite directions. If people on the slow train see the fast train passing the window, the time is 6 minutes Second, how many seconds does it take for people on the express to see the local train passing the window? Why?
- 9. The two trains are facing each other. The express is 280 meters long and the local is 385 meters long. People sitting on the express watch the local run for 11 seconds
- 10. An express train and a local train run in opposite directions. The length of the express train is 280 meters, and that of the local train is 385 meters. The time for people sitting on the express train to see the local train passing is 11 seconds, so the time for people sitting on the local train to see the express train passing is 11 seconds______ Seconds
- 11. How to refit motorcycle engine fast? How to increase the power of the engine, for example: 110 type
- 12. A correspondent rides a motorcycle to deliver the documents within the prescribed time. His speed is 36 kilometers per hour. As a result, he arrives 20 minutes earlier. If he is 30 kilometers per hour, he is 12 minutes late? What's the distance?
- 13. The total age of Zhang Ming and Wang Hua this year is 27. When Wang Hua was as old as Xiao Ming, their age ratio was 3:4. How old is Wang Hua this year?
- 14. Party A and Party B start from the same place in the opposite direction at the same time. Party A rides a bicycle and travels 12 kilometers per hour. Party B rides a motorcycle and travels 40 kilometers per hour. How many kilometers are there after three quarters of an hour
- 15. Wang Hua and Zhang Ming are good friends. He goes to school with him every day. What's wrong with this sentence
- 16. A. B: the distance between the two places is 15 kilometers. One car is 50 kilometers per hour and the other is 40 kilometers A. B is 15 kilometers apart. One car starts from a at 50 kilometers per hour and the other at 40 kilometers per hour. At the same time, they start in the same direction. After a few hours, the two cars are 30 kilometers apart
- 17. How many days does it take for a plane to circle the earth's equator at the speed of 800 kilometers per hour?
- 18. An airplane flies about 1000 meters, 90 kilometers and 900 kilometers per hour
- 19. A plane makes a uniform linear motion and flies 1000 meters in 5 seconds. How many meters per second is its speed? How many kilometers per hour?
- 20. A bicycle travels 16 kilometers in 2 hours and an airplane 1200 meters in 2 seconds. What is the speed ratio between a bicycle and an airplane?