How may cement sand and gravel in 1 cubic meter of concrete if the ratio is 1 is 2 is to 4?

Answer 1

To calculate the quantities of cement, sand, and gravel in 1 cubic meter of concrete with a ratio of 1:2:4, you first need to determine the total parts of the mixture, which is 1+2+4=7 parts. Then, divide 1 cubic meter by the total parts (1/7, 2/7, 4/7) to get the volume of each ingredient. So, in 1 cubic meter of concrete, you would have 0.143 cubic meters of cement, 0.286 cubic meters of sand, and 0.571 cubic meters of gravel.

Answer 2

As ratio is 1 : 2 : 4, there are 1 + 2 + 4 = 7 parts in total

Therefore 1 part is 1 m3 ÷ 7 = 1/7 m3

cement : sand : gravel = 1 : 2 : 4

→ 1 x 1/7 m3 : 2 x 1/7 m3 : 4 x 1/7 m3 =

• 1/7 m3 ≈ 0.14 m3 cement;
• 2/7 m3 ≈ 0.29 m3 sand;
• 4/7 m3 ≈ 0.57 m3 gravel

[mortar and concrete is mixed by volume.]