Question

How much of an alloy that is 30% copper should be mixed with 600 ounces of an alloy that is 80% copper in order to get an alloy that is 40% copper?

Answer 1

Answer: The amount is =2400 ounces

Explanation:

Let

x

ouncs be amount of the alloy

And the total

=

x

+

600

ounces

Therefore the balance with respect to copper is

x

⋅

0.3

+

600

⋅

0.8

=

(

x

+

600

)

⋅

0.4

0.3

x

+

480

=

0.4

x

+

240

0.1

x

=

240

x

=

2400

ounces