In an alloy of copper and tin weighing 1400 g 30% tin Find: a) the weight of copper and the weight of tin in the alloy

In an alloy of copper and tin weighing 1400 g 30% tin Find: a) the weight of copper and the weight of tin in the alloy b) how much% of copper is in the alloy c) what% is the weight of tin from the weight of copper

We have an alloy of two metals.

If the tin content is 30%, then the copper content is: 100 – 30 = 70 (%).

The weight of the alloy is 1400 g, which is 100%. We make the proportion:

1400 – 100%

x – 30%

x = 1400 x 30/100

x = 420

This means that the weight of tin in the alloy is 420 grams.

You can calculate it in another way: 1400 x 30% = 420.

The copper content is calculated in any of the following ways:

1) 1400 x 70% = 980 (grams).

2) 1400 – 420 = 980 (grams).

To determine what percentage of the weight of copper is tin. Let’s take the weight of copper as 100%. Let’s make the proportion:

980 – 100%

420 – x%

x = 420 x 100/980

x = 42.86%