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A jeweler has five rings, each weighing 18 grams, made of an alloy of 10% silver and 90% gold. He decides to melt down the rings and add enough silver to reduce the gold content…
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A jeweler has five rings, each weighing 18 grams, made of an alloy of 10% silver and 90% gold. He decides to melt down the rings and add enough silver to reduce the gold content…
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Sep 12, 2018
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A jeweler has five rings, each weighing 18 grams, made of an alloy of 10% silver and 90% gold. He decides to melt down the rings and add enough silver to reduce the gold content to 45 %. How much silver should he add?
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He should add 55% of silver.
10% = 1.8
5% = 0.9
1.8 * 5 = 9
9 + 0.9 = 9.9
He should add 9.9g of silver.
Abhishek Prakash
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Sep 18, 2018
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