A builder combines cement, water, sand, and gravel in a weight ratio of 1 : 2 : 5 : 2 to create concrete. How many pounds of sand are required to produce 40 pounds of concrete?

Correct answer marked below

A

2.5

B

5.0

C

10.0

D

15.0

20.0

Correct

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The correct answer is E. To find the amount of sand needed,…

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A

AvniAug 1, 2024

Thank you very much!

W

WongJul 10, 2024

thanks!

What this question tests

Your ability to reason about weighted averages and the composition of mixtures.

Averaging the percentages of two solutions without weighting by their volumes.

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