There is 80g of gold in 320g of an alloy of gold and silver. How many grams of gold is in an alloy with a mass of 120g?
| February 23, 2021 | education
The task:
In 320g of alloy, there is 80g of gold.
In 120g of alloy, there is an unknown amount of gold, which we take for “x”.
Let’s make the proportion:
320 – 80,
120 – “x”,
From the proportion we find what “X” is equal to:
x = (120 * 80) / 320,
x = 30.
Answer: 120g of alloy contains 30g of gold.
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