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?

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?

96 tons?

The quality of cement transported from the warehouse to the two construction sites is the same. The first vehicle is transported to the construction site of Party A, each time 3 / 2 t
The second car is used to transport 5 / 2 tons of cement to the second base. During the rest time, the second car carries 3 times less than the first car. Besides, there are still 7 / 2 tons of cement left for the construction site and 4 tons left for the construction site. How much cement should be transported to each construction site?

Suppose that the first vehicle carries x times, then the second vehicle carries (x-3) times
The equation is obtained from the title
3/2*x +7/2 = 5/2 *(x-3) + 4
11-4=x
X = 7 tons
So seven tons of cement should be delivered to each site

One part of cement, two parts of yellow sand and three parts of stone are used in the construction site to prepare one kind of concrete. At present, 6 tons of concrete should be prepared. Is ten bags of cement of the brand shown in the figure enough?
Conch Cement 50kg

The amount of cement required for 6 tons of concrete is: 6 * (1 / (1 + 2 + 3)) = 1 ton = 1000 kg
10 bags of 50 kg cement = 500 kg, 500 kg less, so it's not enough

4. A batch of cement was originally planned to be transported in 15 days. As 20 tons more than the original plan were transported every day, the transportation was completed in 10 days. How many tons of this batch of cement?
We should not set up unknowns, but use the thinking of primary school students

Because it was planned to be finished in 15 days, it was shipped 1 / 15 every day
As 20 tons more than the original plan are transported every day, the transportation is finished in 10 days, so the transportation is 1 / 10 every day
So every day more luck: 1 / 10 - 1 / 15 = 1 / 30
So this batch of cement: 20 / (1 / 30) = 600 tons