Question

bob the builder is making 480 kg of concrete mix . concrete is made by mixing cement , sand and gravel in the ratio 1:3:4 . how much sand does he need? ​

Answer 1

$\huge\mathcal\red{HELLo!}$

It is given that concrete is made by mixing cement, sand and gravel in the ratio 1:3:4. Let the amount of cement, sand and gravel in concrete mixture be x, 3x, 4x respectively. Divide both sides by 8. Therefore bob the builder need 180 kg sand.

Answer 2

Answer:waffler

Explanation:so first you do 1+3+4=15

than you do 15 x 9 =7956 therefore you divivde 7956 and 15 to make 1 billion