A concrete blend consists of three components. In terms of weight, half of the blend is sand, 2/5 of the blend is water, and the leftover 10 pounds of the blend is gravel. What is the total weight of the blend in pounds?

Correct answer marked below

A

20

B

30

C

50

D

70

100

Correct

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P

PietroJan 7, 2025

This is definitely a test-day trap

J

JonathanJul 6, 2024

Greatt

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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