Question

The ratio of copper and zinc in an alloy is $9:5$. If the weight of zinc in the alloy is $9.5gm$, then weight of copper in it is ______ .

• A. $17.2gm$
• B. $17.1gm$
• C. $17.5gm$
• D. $17.4gm$

Answer 1

The correct option is B $17.1gm$

The amount of Zinc is proportional to the weight of zinc.

Thus: $\frac{9}{5}=\frac{WeightOfCopper}{9.5gm}$

Thus, Weight Of Copper $=17.1gm$