![](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>)
There are 6 tons of cement, 6 tons of yellow sand and 6 tons of stone on the construction site. Now a kind of concrete is prepared according to the weight ratio of cement, yellow sand and stone 2:3:4,
1. If the total amount of preparation is x tons, then cement = x * 2 / 9; yellow sand = x * 3 / 9; stone = x * 6 / 9
If the amount of yellow sand is exactly 6 tons, then 6 = x * 3 / 9, x = 18 tons
It can be seen that the cement consumption is 4 tons and the stone consumption is 8 tons
So if the amount of yellow sand is right, then the cement is 2 tons more and the stone is 2 tons less
2.60/(2/3)=60*(3/2)=90
90 * 4 / 9 = 40 km / h
90 * 5 / 9 = 50 km / h
Party A and Party B set out from a and B at the same time and went opposite. As a result, they met 60 meters away from the midpoint. It is known that Party A has 20% more rows than Party B. the distance between a and B is calculated
Let B walk n meters, then a walk 1.2N meters, according to the title meaning is: 1.2N = 1 / 2 [1.2N + n] + 60, solution N = 600 meters, then AB distance = 1.2N + n = 2.2n = 1320 meters
The two piles of coal a and B are the same weight. Three fifths of the coal in pile a is transported, and 60% of the coal in pile B is transported. What is the weight relationship between the remaining two piles?
Because a and B are the same weight, and because 3 / 5 = 60%, the weight transported is equal, so the weight relationship between the remaining two piles is equal
If there is anything you don't know, you can continue to ask me. I hope you can adopt it
The length of the two stations is 460 km. A passenger train runs from station a to station B at the speed of 60 km per hour. At the same time, a freight train runs at the speed of 55 km per hour
From station B to station a, after? Hours, the two cars meet (using equation solution)
Let's meet in X hours
（60+55）x=460
115x=460
X=4
If you don't understand this question, you can ask. If you are satisfied, please click "select as satisfactory answer"
Let two cars meet after X hours
60x+55x=460
(Note: 60x: distance of passenger cars, 55x: distance of freight cars, 460: total distance)
X=4
A: we met after 4 hours.
All the cement in the warehouse should be removed. In the first time, 1 / 2 and 1 / 2 tons of cement should be removed. In the second time, the remaining 1 / 3 and 1 / 3 tons should be removed. In the third time, the cement should be removed
In the second time, the remaining 1 / 4 and 1 / 4 tons were transported. In the fourth time, the remaining 1 / 5 and 1 / 5 tons were transported away in the third time. In the fifth time, the remaining 19 tons were transported away. How many tons of cement was there in this warehouse
99 tons
Suppose there are x tons of cement,
For the first time, X / 2 + 1 / 2 tons were transported, and the remaining X / 2-1 / 2 tons were transported;
For the second time, X / 6 + 1 / 6 tons were transported, and the remaining X / 3-2 / 3 tons were transported;
For the third time, X / 12 + 1 / 12 tons were transported, and the remaining X / 4-3 / 4 tons were transported;
For the fourth time, X / 20 + 1 / 20 tons were transported, and the remaining X / 5-4 / 5 tons were transported;
x/5-4/5=19
We get x = 99
Please make it clear that all the cement in the warehouse should be removed. In the first time, all the 1 / 2 and 1 / 2 tons should be removed. In the second time, the remaining 1 / 3 and 1 / 4 tons should be removed. In the fourth time, the remaining 1 / 5 and 1 / 5 tons should be removed. In the fifth time, the remaining 19 tons should be removed. How many tons of cement was there in this warehouse? 2 / 1 refers to 2 / 1 of a unit, 2 / 1 ton refers to 2 / 1 of a ton, have you ever studied fractions? ... unfold
Follow up: all the cement in the warehouse should be removed, and 1 / 2 of it should be removed for the first time Another 1 / 2 ton, the second time transported the remaining 1 / 3 ton, the third time transported the remaining 1 / 4 ton, the fourth time transported the remaining 1 / 5 ton, the fifth time transported the remaining 19 tons. How many tons of cement was there in this warehouse? 2 / 1 refers to 2 / 1 of unit 1, 2 / 1 refers to 2 / 1 of unit 1, have you learned the score?
The speed of a is 56 times that of B, and a travels 800 meters per minute. Find the distance between a and B
A: the distance between a and B is 7040 meters
The weight ratio of coal in pile a and pile B is 5:3. If 14 tons of coal is transported from pile a to pile B, there will be 60 tons of coal in pile a, and how many tons of original coal in pile B?
60 (1-14) × 35, = 60 (1-14) × 35, = 48 (T), a: the original coal of pile B is 48 t
Three hours later, a runs three eighths of the whole journey and B runs three fifths of the whole journey. Which car is closest to the midpoint
1 / 2 - 3 / 8 = 1 / 8 = 0.125 a car
3 / 5 - 1 / 2 = 1 / 10 = 0.1 B car
Car B is near the midpoint
~If you agree with my answer, please click the "adopt as satisfactory answer" button in time~
~If you ask questions from your mobile phone, just click "satisfied" in the upper right corner of the client
~Your adoption is my driving force~~
O(∩_ Help each other and make progress together!
There are several tons of flour in the warehouse. In the first time, 13 tons were transported away, in the second time, 27 tons were transported away, and in the end, 512 tons were left. How many tons of flour are there in the warehouse?
13 + 512 = 34; 27 ^ (1-34), = 27 ^ 14, = 108 (tons); a: the original flour in the warehouse is 108 tons
A and B start at the same time from AB and go opposite each other. The distance between the meeting point and the midpoint is 320 meters. It is known that the speed of a car is 5 / 6 of that of B car, and the speed of a car is 5 / 6 of that of B car
Minute LINE 800 meters, seeking AB two places distance
Speed of B: 800 △ 5 / 6 = 960
Speed difference between two cars: 960-800 = 160
The distance between car B and car a: 320 × 2 = 640
Driving time of two vehicles: 640 △ 160 = 4
Distance between the two places: (800 + 960) × 4 = 7040
A: the distance between AB and ab is 7040 meters
RELATED INFORMATIONS
- 1. A total of 320 tons of coal are planted in the two piles. The weight of pile a is 60% of that of pile B. how many tons of coal are the two piles?
- 2. There are 200 tons of cement in the warehouse. Two fifths of the total are transported in the first time, and the remaining two fifths are transported in the second time How many tons Arithmetic solution
- 3. The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 14 tons of grain are transported out of warehouse A and 6 tons are transported in warehouse B, then the grain in warehouse B is 14 tons more than that in warehouse A. how many tons of grain were stored in warehouse a?
- 4. The number of people in workshop a is three-quarters of that in workshop B. if 60 people are transferred from workshop B to workshop a, then the number of people in workshop B is two-thirds of that in workshop a How many people are there in workshop a?
- 5. There are 360 workers in a factory, among which the number of female workers is 40 less than 3 times of that of male workers. How many are there in this factory?
- 6. In a workshop, male workers account for 40% of the total number of workers. Later, 20 male workers were transferred, and the number of male workers is 50% of the total number of workers How many people are there
- 7. There are 400 workers in the workshop, among which the ratio of female workers to male workers is 9:16. After another batch of female workers are recruited, the number of male workers accounts for 40% of the total number. How many workers are there in the workshop?
- 8. There are 45 workers in a workshop, of which the ratio of male workers to female workers is 3:2. Later, how many male workers are recruited, and now male workers account for 16 / 25 of the total number, and more male workers are recruited?
- 9. The number of female workers in a workshop accounts for 3 / 8, and then four female workers are recruited. At this time, the number of female workers accounts for 4 / 9 of the total number of workers. There are () workers in this workshop
- 10. There are 120 workers in a factory. The female workers are three fifths of the male workers. How many are the male workers?
- 11. There are two cups of water of the same quality. For the first time, pour one-half of a into cup B; for the second time, pour one-third of a into cup a; for the third time, pour one-quarter of a into cup B; for the ninth time, pour one tenth of a into cup B. at this time, how much is the water in cup B?
- 12. One third of the yellow sand is used for the first time, and the remaining one fourth is used for the second time. (1) if it is still 18 tons, how many tons are there in this pile? (2) One third of the yellow sand will be used in the first time, and the remaining one fourth will be used in the second time. (1) if it is still 18 tons, how many tons of yellow sand will there be? (2) if it is 22 tons in two times, how many tons of yellow sand will there be? (3) if it is more than 2 tons in the first time, how many tons of yellow sand will there be?
- 13. The quality ratio of rice in warehouse A and warehouse B is 5:2. If 20% of the rice is taken from warehouse A and put into warehouse B, then the rice in warehouse A is 12 tons more than that in warehouse B. how many tons of rice are there in warehouse A and warehouse B?
- 14. In order to transport 450 tons of yellow sand to the construction site, one third of the total amount will be transported in the first time, and two fifths of the total amount will be transported in the second time. How many tons will be transported
- 15. A and B piles of coal are the same weight. A pile of coal carries a quarter of its weight, B pile of coal carries a quarter of its weight. What is the weight of the remaining two piles of coal? A: Coal in pile a is heavier than that in pile B. coal in pile B is heavier than that in pile A. coal in pile B is heavier than that in pile A. coal in pile a is heavier than that in pile B. coal in pile B is heavier than that in pile A. coal in pile B is heavier than that in pile A. coal in pile C is
- 16. A batch of cement has to be transported by car. In the first time, one-third less than 5 tons of the total cement has been transported. In the second time, one-quarter more than 3 tons of the total cement has been transported. There are 27 tons left. How many tons of this batch of cement?
- 17. There are 72 tons of coal in pile a and pile B. four fifths of the coal in pile a is transported and 75% of the coal in pile B is transported. The remaining coal is exactly the same. How many tons of coal are there in the two piles?
- 18. Party A and Party B transport a batch of cement together. At the end of the transport, party a transport more than two fifths of the total amount of 14 tons, Party B transport more than one fourth, how many tons did party a transport
- 19. A, B and C transported 40% of the total amount of wheat, 150 kg more than B. the weight ratio of B to C was 3:2 How many kilos?
- 20. A and B start from a to B at the same time. It is known that the speeds of a and B are 80 km / h and 60 km / h respectively. If a and B are x km apart, then