The alloy contains 34% tin. How many grams of tin is in 240 g of the alloy?

The alloy contains 34% tin. How many grams of tin is in 240 g of the alloy? What is the weight of the alloy containing 85 g of tin?

1) Let’s designate the mass of the entire alloy as 100%. The mass of the alloy is 240 g, the tin in it is 34%.

Let’s make a short note:

240 g – 100%,

x g – 34%.

The equation turns out: 240 / x = 100/34.

According to the rule of proportion: 100x = 240 * 34.

100x = 8160;

x = 8160/100 = 81.60 (g) tin.

Answer: an alloy weighing 240 g contains 81.6 g of tin.

2) Let’s designate the mass of the entire alloy as 100%. The mass of tin in the alloy is 85 g, which is 34%.

Let’s make a short note:

x g – 100%,

85 g – 34%.

The equation turns out: x / 85 = 100/34.

According to the rule of proportion: 34x = 85 * 100.

34x = 8500;

x = 8500/34 = 250 (g) mass of the alloy.

Answer: The mass of an alloy containing 85 g of tin is 250 g.