Question

An industrial cleaner is manufactured using only the $3$ secret ingredients $X,Y$ and $Z$, which are mixed in the ratio of $2:3:5$ respectively, by weight. How many pounds of secret ingredient $Y$ are in a $42$ pound (net weight) bucket of this cleaner?

• A. $4.2$
• B. $12.6$
• C. $14.0$
• D. $18.0$

Answer 1

The correct option is B $12.6$

Industrial cleaner is manufactured using 3 secret ingredients $X,Y,Z$.
Their mixing ratio is $2:3:5$
Net weight of cleaner is $42$ pound
so, pounds of Y will be $\frac{3}{10}\times 42=12.6$