In our village, the road surface should be hardened, 1400 meters long, 4 meters wide and 18 cm thick. How much cement, sand and stones do C30 and C25 need? What is the budget contract

In our village, the road surface should be hardened, 1400 meters long, 4 meters wide and 18 cm thick. How much cement, sand and stones do C30 and C25 need? What is the budget contract

1400 * 4 * 0.18 = 1008 m3 concrete
The mix proportion of C30 concrete is 1:1.4:3.2:0.45
400 kg of cement, 560 kg of sand and 1280 kg of stone are needed per cubic meter
The mix proportion is not necessarily accurate. It can only be accurately calculated according to the mix proportion notice issued by the laboratory. The contract price depends on the local labor and material prices