![](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>)
At the same time, the passenger car and the freight car set out from the two places of Party A and Party B, and they went opposite each other. After 7 hours, they met. The speed of the freight car was 9 / 10 of that of the passenger car. How many kilometers did the passenger car travel per hour The distance between the two places is 665 km
If the passenger car speed x is set, the freight car speed is 9 / 10x
7(1+9/10)x=665
If the bus speed is x, then the truck speed is 9 / 10x,
(x+9/10X)x7=665
x=35.
s=35x7=245
What grade are you in? Let's set the bus as X, the truck as 9 / 10x, and 7 (x + 9 / 10x) = 665
Finally, x = 50
Bus 50 km / h
Assuming that the passenger car travels x kilometers per hour, the freight car travels 9x / 10 kilometers per hour
From the meaning of the title: (x + 9x / 10) X7 = 665
Then x = 50
So the bus travels 50 kilometers per hour.
The road from a to B is 392 meters long. A car travels 168 kilometers in three hours. How many hours will it take to complete the whole journey
It will take x hours to complete the whole process
392-168：X=168：3
168X=3*224
X=4
It will take four hours to finish the whole journey
A car travels 168 km in 3 hours, with an average speed of 168 △ 3 = 56 km / h
So it takes (392-168) △ 56 = 224 △ 56 = 4 hours to complete the whole journey
I hope the answer will help you
（392-168）/X=168/3
We get x = 4
168/392=3/7
3/x=3/7,x=7
Take one eighth of the coal from pile a and give it to pile B. at this time, the weight of the two piles of coal is equal?
2 / 8 = 1 / 4 more from pile a than pile B
B is (1-1 / 4) △ 1 = 3 / 4 = 75% of A
75% (1-2 / 8)
Suppose that the weight of coal pile B is x and that of coal pile a is y, then x + Y / 8 = 7Y / 8, so x = 6y / 8, that is 75%
A-A / 8 = B + A / 8, then B = 3 / 4 * a
So: the weight of pile B coal is 75% of that of pile a coal
3/8÷5/8=60％
The speed of the freight car is 40% of that of the passenger car. The freight car and the passenger car run from a and B at the same time. After two hours, they meet,
When they meet, the distance ratio of freight cars to passenger cars is (): ()
5：2
V goods: V customers = 40% = 2:5
T is the same as 2
Then s Customer: s goods = V customer: V goods = 5:2
0.4：1
When the time is the same, the speed ratio is equal to the distance ratio
2:5
It took two days for a car to travel from a to B. on the first day, it took more than 168 kilometers. The ratio of the distance on the second day to the distance on the first day is 1:4. How many kilometers is the distance between a and B?
Two fifths of the whole journey is 168 km on the first day, and the ratio of the journey on the second day to the journey on the first day is 1:4. Then the whole journey is 2 / 5 × 1 / 4 more than 168 × 1 / 4 km on the second day, that is, 1 / 10 more than 42 km on the whole journey, and 2 / 5 + 1 / 10 more than 168 + 42 km on the two days, that is, 1 / 2 more than 210 km on the whole journey
The two piles of coal weigh 160 tons in total. If the first pile carries more than 20 tons and the second pile carries two fifths, how many tons will the two teams carry
Both Party A and Party B transport 2 / 5
Transport 160x2 / 5 = 64 tons
A total of 64 + 20 = 84 tons were transported
The distance between a and B is 560 km. A bus and a truck leave from a and B at the same time. After 3.5 hours, the two cars meet. The bus runs 90 km per hour, and the truck runs how many km per hour?
(560-3.5 × 90) △ 3.5, = (560-315) △ 3.5, = 245 △ 3.5, = 70 (km), a: the freight car travels 70 km per hour
The highway from Huzhou to Shanghai is 168 kilometers long. A and B cars leave the two cities at the same time. After 1.5 hours of intersection, a car runs 58 kilometers per hour. How many kilometers per hour does B car run?
168 △ 1.5-58 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; = 112-58 = 54 (km). A: car B runs 54 km per hour
For a pile of coal, two fifths of the coal is used first, and then four ninths of the total coal is used. This is 31 tons more than the rest. How many tons are there in this pile of coal?
It's better to say what each step means
Suppose there are x tons of coal in this pile
Then x * (2 / 5 + 4 / 9) is used successively
The rest is x-x * (2 / 5 + 4 / 9)
It can be solved by the following equation
x*（2/5+4/9）=x-x*（2/5+4/9）+31
31x/45=31
x=45
There are 45 tons of coal in this pile
A passenger car and a freight car, respectively, set out from both places at the same time, facing each other
Passenger cars travel 80 kilometers per hour, and freight cars travel 10% of the whole journey per hour. When the freight car reaches 5% of the whole journey, the passenger car can reach place B by 1 / 6 of the whole journey. How many kilometers is the distance between Party A and Party B?
When the freight car reaches 5 / 8 of the whole journey, the passenger car can reach place B by 1 / 6 of the whole journey. How many kilometers is the distance between the two places? The solution is: 10% of the whole journey of the freight car per hour, when the freight car reaches 5 / 8 of the whole journey, the time is: 5 / 8 △ 10
When the freight car reaches 5% of the whole journey, the traveling time of the freight car is as follows:
5 / 8 / (1 / 10) = 25 / 4 hours
Distance between a and B:
80*25/4/(1-1/6)
=500/(5/6)
=600 km
That is, the distance between a and B is 600 km.
RELATED INFORMATIONS
- 1. A total of 104.5 tons of goods were transported by the two vehicles, and the goods transported by the vehicle a were 0.5 tons less than that of the vehicle B. how many tons of goods were transported by the two vehicles? It's a lesson in volume two of grade five, four exercises, 92 pages
- 2. The two piles of coal have 1300kg. When the first pile burns 2 / 3 and the second pile burns 5 / 7, the remaining coal is the same. How many kg of each pile
- 3. Passenger and freight cars leave from the two places at the same time. After three hours, they meet. Passenger cars travel 72 kilometers per hour and freight cars 78 kilometers per hour. How many kilometers are there between the two places
- 4. The transport team has to carry 72 tons of goods, 16 vehicles have been carried away, and there is still one ninth of them without dizziness. How many tons of goods are carried by each vehicle on average?
- 5. A and B have 300 tons of coal in total. A transports two fifths of the coal and B transports back two fifths of the coal. Now B has 20 tons more than A. how many tons each of a and B?
- 6. When the two vehicles meet, the distance ratio of the two vehicles is 5:4; after the meeting, the truck is 27 kilometers faster than the bus per hour As a result, the two cars arrived at the other side's departure station at the same time. It is known that the freight car has been running for 10 hours. How many kilometers is the distance between a and B?
- 7. The transport team transported a batch of rice to the disaster area. In the morning, it took 4 trucks to transport 25, with an average of 20% per truck______ What about the rest of the rice______ The car can't be finished
- 8. There are two kinds of trucks. Car a can load 6 tons of coal each time, and car B can load 8 tons of coal each time. There are 400 tons of coal at present, which are required to be transported at one time, and each truck can be transported at the same time It's just full. How many trucks do you need? Requirements: column equation, column formula are OK, as long as the reason, the process to be listed
- 9. A passenger car and a freight car leave from the two places at the same time. The distance between the two cars is 20 kilometers in 4.5 hours. The known speed of the passenger car is 60 kilometers per hour, and the speed of the freight car is 70% of that of the passenger car. How many kilometers is the distance between the two cities?
- 10. When a batch of goods is to be transported to a certain place, the owner of the goods is going to rent two kinds of trucks from the motor transport company. The situation of renting these two kinds of trucks in the past is shown in the table below Now we rent 5 A-type trucks and 6 B-type trucks from the company. We have just finished the goods at one time. How many tons of the goods are there? The first time and the second time Number of goods vehicles of Party A 3 2 Number of vehicles of goods B 4 3 Cumulative tonnage 36 26
- 11. At this time, the weight of coal in pile B is 8% less than that in pile a?
- 12. The fast train is 168m, and the slow train is 184m. If the two trains are running in opposite directions, it takes 4 seconds from meeting to leaving. If they are running in the same direction, it takes 16 seconds from the fast train chasing the slow train to leaving,
- 13. The speed of car a is 15 kilometers faster than that of car B. It is known that the speed ratio of the two cars is 5:4. How many kilometers is the distance between city a and city B
- 14. There are two piles of coal, pile a of 4.5 tons and pile B of 6 tons. Pile a uses 0.36 tons a day and pile B uses 0.51 tons a day. After a few days, the remaining coal in the two piles is equal? (solution of equations) Kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka kaka
- 15. How many kilometers does a car travel per hour
- 16. A and B two cars from a and B at the same time, the speed ratio is 4:5, after meeting the two cars continue to move forward, respectively, after arriving at Ba two places immediately return They meet again on the way. If they meet 40 kilometers apart, how many kilometers are AB and ab?
- 17. The total weight of two tons of coal is 2268 kg. Two fifths of coal a and one fourth of coal B are taken out, and the total weight is 708 kg?
- 18. A car carries 42.5 tons of goods five times in the first day, and six times in the second day, with an average of 0.25 tons less than the first day?
- 19. Car a and car B run from a and B at the same time. Car a runs 56 kilometers per hour and car B runs 48 kilometers per hour. The two cars meet at 32 kilometers from the midpoint. How many kilometers is the distance between a and B?
- 20. A packet of sugar, an average of six children, five more Average 7 kids, 6 less