The proportion of copper and zinc in the brass is 13:7. How much zinc will there be in 100 kg of brass? Choose the correct option.
A) 73  B) 35  C) 83  D) 63  E) 83
Explanation:   7/20 * 100= 
<gadget id="calculator">7/20 * 100</gadget>
<output>35</output>
35   Answer: Option 35
<result>B</result>
The proportion of copper and zinc in the brass is 13:7. How much zinc will there be in 100 kg of brass?