# Thread: mixture problem

1. ## mixture problem

find the cost per kilo of a coffee mixture made from 8 kls of coffee that cost $90 pero kilo and 12 kls of coffee that cost$55 pero kilo.

thanks

2. ## Re: mixture problem

Originally Posted by rcs
find the cost per kilo of a coffee mixture made from 8 kls of coffee that cost $90 pero kilo and 12 kls of coffee that cost$55 pero kilo.
cost/kilo = $\frac{8 \cdot 90 + 12 \cdot 55}{8 + 12}$

3. ## Re: mixture problem

8 kls = $90.00 = 90*8 =720--------- 1 12 kls =$55.00 = 55*12 = 660 --------- 2
Then the mixture of both is 20 Kls
Total of equation 1 & 2 is 1380
So , the mixture of 1 kls = (1380/20) = \$69 / kls