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The highway between the two places is 50 kilometers long, with one person riding a bicycle and the other riding a motorcycle A. B the highway between the two places is 50 kilometers long. One person rides a bicycle and the other rides a motorcycle. The motorcycle starts 1 hour and 30 minutes later than the bicycle and arrives 1 hour earlier. It is known that the speed of the motorcycle is 2.5 times that of the bicycle. The speed of the motorcycle and the bicycle can be calculated
If the velocity of a is x, then the velocity of B is 2.5x,
A starts for 1.5 hours, finishes the distance of 1.5x, and the remaining distance is 50-1.5x, which takes time (50-1.5x) / X;
The second time is 50 / 2.5x;
According to the results, B is 1 hour earlier than a,
So, (50-1.5x) / x-50 / 2.5x = 1
x=12
2.5x=30
The speed of a is 12km / h; the speed of B is 30km / h
On the AB section of the road, a rides a bicycle from a to B, and B rides a motorcycle from B to A. they start at the same time. After 80 minutes, they meet. B turns back immediately after arriving at a, catches up with a 40 minutes after the first meeting, and B returns immediately after arriving at B. how much time will it take for a and B to meet again?
80 × 3-80-40 = 240-80-40 = 120 minutes. A: A and B will meet again in 120 minutes
a. B the highway between the two places is 100 kilometers long. One person rides a bicycle, and the other person rides a motorcycle. The motorcycle starts one hour later than the bicycle, but arrives two hours earlier. It is known that the speed of the motorcycle is 2.5 times that of the bicycle. Find the speed of the motorcycle and bicycle!
Let the speed of a single car be x and that of a motorcycle be y
Y=2.5X
1000/X -3=1000/Y
The solution is: x = 200, y = 500
(ask for the answer) a rides a bicycle and B rides a motorcycle from ab at the same time. Two hours later, they meet at 25km away from the midpoint. It is known that it takes 3 hours for B to complete the whole journey by motorcycle and how many hours for a to complete the whole journey by bike?
Let common sense know that motorcycles are faster
The meeting point is closer to a
B the rest of the way is a bike ride for 2 hours
A ride for 2 hours = B motorcycle (3-2) = 1 hour
V A: v b = 1:2
It takes three hours for B. It takes six hours for a
There are redundant interference conditions in this subject
RELATED INFORMATIONS
- 1. A. The distance between B and B is 50km. A and B are from a to B. It is known that a rides a bicycle, B rides a motorcycle, and B starts 1 hour and 30 minutes later than a When you arrive an hour earlier, you know that the speed of a motorcycle is 2.5 times that of a bicycle. What are the respective speeds of a motorcycle and a bicycle? Ask for detailed explanation
- 2. A rides a motorcycle while B rides a bicycle. At the same time, a and B are 250 kilometers apart. After five hours of meeting, it is known that the distance a travels per hour is six kilometers less than three times that B travels per hour. How to find the speed of B's bicycle [solve the problem with the equation of one variable once]
- 3. A rides a bicycle. B rides a motorcycle from two places 72 kilometers apart. After three hours of meeting, it is known that B's speed is three times that of A Q: how many kilometers did they walk when they met?
- 4. Observe the following column number: - 1, 2, - 3, 4, - 5, 6, - 7 Let AIJ be the number in row I and column J, for example, A23 = 4, then A87 is______ ．
- 5. A number is an even number smaller than 30 and a multiple of 3. What is the possible number
- 6. The sum of five consecutive even numbers is 130. What are the five even numbers?
- 7. The sum of five consecutive even numbers is 130. What are the five consecutive even numbers?
- 8. The sum of five consecutive even numbers is 170. What are the five consecutive even numbers?
- 9. Car a and car B leave from two places 650 meters apart at the same time. Car a travels 65 km per hour. After 6.5 hours, the two cars meet on the way. How many km per hour does car B travel
- 10. The shape of a workpiece is shown in the figure, the degree of BC is 60 ° AB = 6cm, the distance from point B to point C is equal to AB, ∠ BAC = 30 °, then the area of the workpiece is equal to () A. 4πB. 6πC. 8πD. 10π
- 11. On the AB section of the road, a rides a bicycle from a to B, and B rides a motorcycle from B to A. they start at the same time. After 80 minutes, they meet. B turns back immediately after arriving at a, catches up with a 40 minutes after the first meeting, and B returns immediately after arriving at B. how much time will it take for a and B to meet again?
- 12. The distance between a and B is 140 km. It takes 2.5 hours for a car to go from a to B, and it takes less than 1 hour to return. What is the average speed of this car?
- 13. The distance between a and B is 150km. It takes a bus two hours to travel 23 times. If the speed remains the same, how many hours will it take for the rest of the journey?
- 14. The distance between a and B is 150km. It takes a bus two hours to travel 23 times. If the speed remains the same, how many hours will it take for the rest of the journey?
- 15. The distance between a and B is 280km. It takes 14 hours for the ship to sail downstream to a and 20 hours for the ship to sail upstream Use binary linear equation to solve. There must be original equations listed!
- 16. A car runs 140 kilometers in 2 hours. At this speed, it runs 5 hours from a to B. how long is the highway between a and B?
- 17. A car from a to B will arrive in 12.5 hours if the planned speed is increased by 20%?
- 18. It took five hours for a car to go from place a to place B, but its speed increased by 20% when it returned. What's the average speed of the car when () is used less?
- 19. A car from a to B, plan to arrive in 5 hours, the actual 4 hours to B. the actual speed is higher than the plan______ %
- 20. When a car goes from place a to place B, its speed is 55 km | h and it arrives in 6 hours. When it comes back, it only takes 5 hours to improve its speed. How many kilometers more per hour does it travel when it comes back than when it goes?