1. ## Simple Problem

Q. Clock brass consists of 64.25% copper, 34% zinc and 1.75% lead. A manufacturer has an unlimited supply of copper and lead but has only 50kg of zinc. How much closs brass can he make?

Simple problem but I just can't get the answer.

Thanks.

2. I think you are missing a piece of information. What is the mass of each clock brass.

3. You will want to set up a proportion.

So $\displaystyle \frac {34}{100}$ = $\displaystyle \frac{50}{x}$

Then you cross multiply to get $\displaystyle \frac{54*100}{34}$= x

So x$\displaystyle \approx$158.82353 and there is your answer.

4. Originally Posted by JoshHJ
You will want to set up a proportion.

So $\displaystyle \frac {34}{100}$ = $\displaystyle \frac{50}{x}$

Then you cross multiply to get $\displaystyle \frac{54*100}{34}$= x

So x$\displaystyle \approx$158.82353 and there is your answer.
Edit:

you cross multiplied wrong
It should be
$\displaystyle \frac{50*100}{34}$= x
x=147

5. OK I get it now. Thanks.

6. Originally Posted by Linnus
Edit:
$\displaystyle \frac{50*100}{34}$= x