Question

In a certain​ chemical, the ratio of zinc to copper is 4 to 13. A jar of the chemical contains 286 of copper. How many grams of zinc does it​ contain?

Answer 1

Answer: It contains 88 g of zinc.

Explanation:

Given: The ratio of zinc to copper is 4 to 13.

Ratio can be written as
`\frac4{13}`

A jar of the chemical contains 286 g of copper.

Let the quantity of zinc be x.

By using the direct proportion rule:
`(x_1)/(y_1)=(x_2)/(y_2)`

`(x)/(286)=(4)/(13)\\\\ x=(286*4)/(13)\\\\\Rightarrow\ x=88`

Hence, It contains 88 g of zinc.