Correct Answer - Option 4 : 35 kg
Given:
Ratio of copper and zinc = 13 : 7
Calculation:
Let total units is 20 kg
So, in 20 kg of brass zinc will be 7 kg and copper is 13 kg
In 100 kg of brass zinc will be
⇒ 100 × (7/20)
⇒ 35 kg
∴ The zinc in 100 kg of brass is 35 kg.