Question

An alloy contains $15\%$zinc, $25\%$ brass and rest copper. How much copper is there in $75$ kg of that alloy?

• A. $20$ kg
• B. $30$ kg
• C. $45$ kg
• D. $10$ kg

Answer 1

The correct option is C $45$ kg

Zinc : $15\%$

Brass : $25\%$

Copper : $100-25-15=100-40=60\%$

Now, For 75 Kg of the Alloy will have

$75\ast \frac{60}{100}=45kg$