![](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>)
15 tons of cement yellow sand stones are transported from the construction site, and a kind of concrete is made according to the ratio of 2:3:5
It is impossible to use up all the yellow sand, because there are not enough stones. According to the current feeding quantity, only stones can be used up. When the stones are used up, no more concrete can be prepared. At this time, there are 15 - (15 △ 5 × 2) = 9 cement and 15 - (15 △ 5 × 3) = 6 sand left
The construction site transported 15 tons of cement yellow sand stones, which were made into a kind of concrete according to the ratio of 2:3:5. When all the yellow sand was used up, how many tons of cement remained and how many tons of stones were transported?
The title of Volume 2 of primary school mathematics grade 6 published by Jiangsu Education Press
The concrete is made of 15 tons of cement sand stone and 2:3:5,
It means 2:3:5 times 5 = 10, 15, 25 tons each
How many tons of cement are left?
15-10 = 5 tons
How many tons of stones have been transported?
It means that the stones need to be transported 25-15 = 10 tons
36 tons of cement are transported, which is 3 / 5 less than that of yellow sand. How many tons of yellow sand are transported from the construction site? How many tons of cement are transported less than that of yellow sand?
Huangsha = 36 ÷ (1-3 / 5) = 90 tons
Less = 90-36 = 54 tons
15 tons of cement are transported from the construction site, which is one third less than that of yellow sand. How many tons of yellow sand are transported?
(x-15)/x=1/3 3x-45=x 2x=45 x=22.5
The yellow sand transported is 22.5 tons
RELATED INFORMATIONS
- 1. The weight of cement on the construction site is two-thirds of that of yellow sand. Twelve tons of cement and fifteen tons of yellow sand are used every day. After a few days, it will be followed up The cement is just used up. There are 12 tons of yellow sand left. How many tons of original cement are there on the construction site?
- 2. There is a batch of cement on the construction site. 30% of the total cement is used in the first time and 60 tons are used in the second time. This is the remaining two fifths. How many tons of cement are left?
- 3. There is a pile of cement on the construction site. After three eighths of it was used, 26 tons of cement was transported. This pile of cement is one sixth more than the original one. How many tons of cement was there in the original pile?
- 4. A batch of cement is transported to the construction site, 1 / 5 of which is used, and the rest is put into two warehouses (A and b) according to the ratio of 3:7 How many tons of cement have been delivered?
- 5. If 180 bags of cement are to be transported to a construction site every day, it will take 40 days. Now it will take 25 days to complete the transportation, how many bags should be transported every day?
- 6. Construction technology of three axis (SMW) cement mixing pile
- 7. For a batch of cement, team a finished it in 10 days, team B finished it in 15 days, and team C finished it in 20 days. Now the three teams are carrying it together at the same time, and team a transferred it halfway. As a result, it was completed in 6 days, and asked a few questions
- 8. A construction site needs sand. If you use the same car to transport 320 cars a day, it will take 25 days to transport it. How many cars do you need to transport 5 days in advance Use the equation to solve it
- 9. A pile of soil, if it takes 30 days to transport 360 vehicles a day, now it needs to complete the task five days in advance, how many vehicles a day?
- 10. It takes 20 days to transport a pile of soil. If you transport 30 vehicles a day, you need to complete the task five days in advance. How many vehicles do you need to transport every day?
- 11. One part of cement, two parts of yellow sand and three parts of gravel are used to prepare a kind of concrete. At present, 6 tons of concrete, 10 bags of conch cement and 50 kg of cement are needed?
- 12. Four trucks transport 54 tons of goods in three times in a warehouse by truck. According to this calculation, how many times do you need to transport 45 tons of goods by five trucks? How many trucks do you need to transport 72 tons of goods by five trucks? How many tons of goods can you transport by three trucks by six times? (12 points) Passenger cars and freight cars start from 540 kilometers away at the same time, and travel in opposite directions. Passenger cars travel 60 kilometers per hour, which is twice the speed of freight cars. How many hours later do the two cars meet on the way? (7 minutes) Party A and Party B set out at the same time from two places with a distance of 6000 meters, and they met on the way 20 minutes later?
- 13. A conical sand pile covers an area of 20 square meters and is 6 meters high. Each square meter of sand weighs about 1.7 tons. If it is transported by a car with a carrying capacity of 5 tons How many times can this pile of sand be transported?
- 14. A cone-shaped sand pile has a bottom circumference of 31.4m, a height of 7.2m and a sand weight of 1.5 tons per cubic meter. How many times can it be transported by a 6-ton truck?
- 15. There is a pile of sand. The first time it carries away two fifths of it, and the second time it carries away the remaining two fifths?
- 16. A pile of sand weighs 700 tons. A truck transports 5 tons each time. How many times do seven vehicles need to transport?
- 17. There are two piles of sand. Pile a is 1.5 tons less than pile B. after 9.9 tons are transported from pile B, the sand in pile B is 80% of pile A. how many tons of sand is there in pile B?
- 18. The construction site needs 63 tons of sand. How many times does a 3-ton truck need to transport it after six times To solve the equation oh. There are relations oh
- 19. The sand pit of Chaoyang primary school is 2.5m long, 1.5m wide and 6dm deep. How many tons of fine sand are needed to fill the sand pit, which weighs 1.5 tons per cubic meter?
- 20. The school has a sand pit which is 43 decimeters long, 34 decimeters wide and 5 decimeters deep. After it is filled with sand, what is the volume of sand in the sand pit? If each cubic decimeter of sand weighs 1.4 kg, how many kg does the sand weigh?