A batch of trail cement mixes gravel to sand in a ratio of 5 to 2. How much sand is in 42 cubic feet of the mix?
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Correct answer to question 171 (Arithmetic Reasoning): 12 cubic feet
Method
The mix divides into 5 + 2 = 7 parts, with sand making up 2 of them. One part is 42 divided by 7, or 6 cubic feet, so sand totals 2 x 6 = 12 cubic feet.
Updated: November 2026
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