The ratio of sand to cement in amixture of concrete is 2 to 7. Howmany bags of sand are needed to mixwith 42 bags of cement?A 8B 12C 18D 49

Question

asked Mar 19, 2023 45.5k views

1 Answer

Arti Singh · Answer 1 · 2023-03-23T08:18:53+0000

Solution:

The ratio of sand to cement is 2:7. Now, consider the following diagram:

now, by cross-multiplication, we get:

$(x)(7)=\text{ (2)(42)}$

solving for x, we get:

$x\text{ = }((2)(42))/(7)$

this is equivalent to:

$x\text{ = 12}$

so that, we can conclude that the correct answer is B:

12