Question no. 25. A jeweller has bars of 18-carat gold and 12-carat gold. How much of each must be melted together to obtain a bar of 16-carat gold weighing 120 grams? (Pure gold is 24-carat).

Dear Student,

Here is the answer to your query.
 
Let x grams of 18 carat gold is added
Thus, the amount of 12 carat gold added is (120 – x) grams.
Purity of gold is 24 carats.
Given that
 
 
Thus, 80 grams of 18 carat gold is added with 12 – 80 = 40 grams of 12 carat gold.
 
Hope! You got the answer.
Cheers!

 

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