From an alloy of copper and nickel, containing 35% nickel, products weighing 700 g were made.

From an alloy of copper and nickel, containing 35% nickel, products weighing 700 g were made. Find the mass of copper in this alloy.

Let’s calculate how many percent copper is contained in the alloy. Let the entire alloy be 100%. Subtract from the entire alloy – 100% of the nickel in this alloy – 35%:

100 – 35 = 65%.

The alloy contains 65% copper. Let’s make a proportion and calculate how much is 65% in grams:

700 grams – 100%,

x gram – 65%.

Let’s solve the proportion and find the unknown x:

x grams = 700 grams * 65%: 100% = 455 grams.

The mass of copper in an alloy weighing 700 grams is 455 grams.

Answer: the mass of copper in an alloy weighing 700 grams is 455 grams.