Home » Test Prep » ACT Section 2: Math » Which are mixed in the ratio of 2:3:5, respectively, by weight. How many pounds of secret ingredient B are in a 42-pound (net weight) bucket of this cleaner?
An industrial cleaner is manufactured using only the 3 secret ingredients A, B, and C, which are mixed in the ratio of 2:3:5, respectively, by weight. How many pounds of secret ingredient B are in a 42-pound (net weight) bucket of this cleaner?
A. 4.2
B. 12.6
C. 14.0
D. 18.0
E. 21.0
Correct Answer: B
Explanation/Reference:
Explanation:
If you let 3x be amount of secret ingredient B, you can set up the equation 2x + 3x + 5x = 42. Since 10x = 42, x = 4.2, and B = 3x = 12.6.
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