![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
A car from a to B, an average of 20 kilometers per hour. To B after the speed of 30 kilometers per hour to return to a, a round trip, a total of 7.5 hours
If the time taken to go is x hours, then the time taken to return is 7.5-x hours
The distance between a and B is 120 kilometers. A car goes from a to B and immediately returns to a for 4.8 hours. The car travels several thousand meters per hour
Speed = 120 △ 4.8 = 25 km / h
A car from a to B, 70 kilometers per hour, 5 hours to arrive. If you want to arrive in 4 hours, how many kilometers per hour? (answer with proportional knowledge)
If you drive x km / h, you will have 4x = 70 × 54x = 350 & nbsp; X = 87.5 A: if you want to arrive in 4 hours, you will drive 87.5 km / h
A car from a to B, car loading goods in the day line 50km, empty car day line 70km, 5 back and forth three times, find the distance between a and B?
The loading speed is 50km / D and the empty speed is 70km / d
Let the distance be X,
Then 3x / 50 + 3x / 70 = 5
x=48.6km
RELATED INFORMATIONS
- 1. The distance between a and B is 325 kilometers. A car leaves at 9:30 a.m. and arrives at its destination at 2:30 p.m. how many kilometers does it travel per hour?
- 2. The distance between a and B is 960 km, and a car can travel 240 km in 4 hours. According to this number of degrees, it will take several hours for the car to reach B
- 3. A car from a to B, 45 kilometers per hour, 4 hours to arrive. Return to 15 kilometers per hour, a few hours to arrive
- 4. A car from a to B, an average of 20 kilometers per hour. To B after the speed of 30 kilometers per hour to return to a, a round trip, a total of 7.5 hours
- 5. A car travels 45 kilometers per hour from place a to place B, and 60 kilometers per hour when it returns. It takes 3.5 hours for a round trip. Find the average speed of the round trip
- 6. The average speed of a car travelling between AB and ab is 45 kilometers per hour when it goes and 30 kilometers per hour when it comes back?
- 7. It takes 8 hours and 45 minutes to get the distance between a and B
- 8. A car from a to B, the first hour of the whole line 25%, the second hour of the whole line 30%, 270 kilometers away from B How many kilometers is the total length of a and B?
- 9. A car from a to B, the first hour of the whole line of 25%, the second hour of the whole line of 30%, two hours a total of 220 kilometers, a and B total length of how many kilometers?
- 10. When a bus goes from place a to place B, three hours later, the ratio of the distance it has traveled to the distance it has not traveled is 2 / 5. After another 60 kilometers, the distance it has traveled is the same as that of the main road fast When a bus goes from place a to place B, three hours later, the ratio of the distance it has traveled to the distance it has not traveled is 2 / 5. After another 60 kilometers, the ratio of the distance it has traveled to the total distance is 5 / 7. How many kilometers are there between a and B?
- 11. A car travels 80 kilometers per hour from a to B, and 75 kilometers per hour when it returns. It takes 9.3 hours from a to B to return to a How many meters is the distance between earth and earth B
- 12. It takes 5 / 4 hours to arrive at the wholesale Station, and it takes only 3 / 2 hours to return, which means that It takes 5 / 4 hours for a car to deliver goods to B at the wholesale Station, which is 45km per hour. It took only 3-2 hours to return. What is the speed of the truck when it returns?
- 13. A freight car and a passenger car travel from the two places opposite each other. The passenger car takes 8 hours to complete the whole journey. It takes 10 hours for the freight car to complete the whole journey. The freight car starts first and meets each other in 1 hour How many hours did the bus run?
- 14. Passenger cars and freight cars depart from a and B at the same time. Passenger cars travel 55 kilometers per hour, 7.5 kilometers slower than freight cars, How many meters apart is the ground? The distance between two places is required
- 15. A passenger car travels 50 kilometers per hour and a freight car 55 kilometers per hour. The two cars leave each other at the same time. When they meet, the freight car travels 7.5 meters more than the passenger car How many kilometers are there between the two places
- 16. The passenger car and the freight car leave from the two places at the same time and meet in 4.5 hours. When they meet, the passenger car runs 292.5 km and the freight car 225 km. How many times is the speed of the passenger car faster than that of the freight car
- 17. The distance between a and B is 100 kilometers. Xiaoming rides a bicycle from a to B. three hours later, Xiaogang also rides a motorcycle from a to B, and arrives two hours earlier than Xiaoming. If Xiaogang's speed is 2.5 times that of Xiaoming,
- 18. A team of cyclists rode from place a to place B at the speed of 24 kilometers per hour. Two hours later, a motorcycle also ran from place a to place B at the speed of 56 kilometers per hour, catching up with the cyclists at half of the distance between place a and place B. Q: the distance between place a and place B is long______ Kilometers
- 19. 2. The distance between a and B is 450 km. A car drives from a to B at three speeds: 50 km / h and 55 km / h 88 km / h, 7.2 hours in total. It is known that the car has driven for 2.4 hours at the speed of 50 km / h, how many hours has it driven at the speed of 88 km / h?
- 20. To build a 2100 meter long road, one third of the total length was built on the first day, and one second on the second day. How many meters are left? be deeply grateful