# Question #91298

##### 3 Answers

#### Answer:

The mass of the

#### Explanation:

This is a mass balance with respect to copper.

Let the mass of the

The mass of the

So,

#### Answer:

**kg of** **copper containing metal alloy and**

**kg of** **copper containing metal alloy were combined.**

#### Explanation:

Let

Then , balancing the input and output of copper content , we get ,

Hence

achieve

#### Answer:

Just for the hell of it this is a different approach:

40 kg at 70% content

10 Kg at 30% content

#### Explanation:

Set material 1

Set material 2

Set target as

Set the amount of 70% alloy be

The mass is fixed at 50Kg thus if you increase the amount of

It models the numbers only approach. It is just that it looks different.

The gradient of part is the same as the gradient of the whole:

So we have:

40 kg at 70% content

10 Kg at 30% content

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