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concrete can be made by mixing cement, sand and gravel in the ratio 3: 6: 8 How much gravel is needed to make 850 m^3 of concrete.

Answer :

The given ratio is 3:6:8 referring to cement, sand, and gravel, respectively.

Based on the given information, we can express the following

[tex]3x+6x+8x=850[/tex]

Now, we solve for x

[tex]\begin{gathered} 17x=850 \\ x=\frac{850}{17} \\ x=50 \end{gathered}[/tex]

Now, we find the gravel using the ratio

[tex]8x=8\cdot50=400[/tex]Hence, they needed 400 cubic meters of gravel.

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