Question

soybean meal is 16% protein; cornmeal is 8% protein. how many pounds of each should be mixed together in order to get 320-lb mixture that is 11% protein?

Answer 1

120 lb of soybean meal

200 lb of cornmeal

Explanation:

S = pounds of soybean meal

C = pounds of cornmeal

S + C = 320 → C = 320 – S

0.16S + 0.08C = 0.11 × 320 = 35.2

16S + 8C = 3520

16S + 8(320 – S) = 3520

16S + 2560 – 8S = 3520

8S + 2560 = 3520

8S = 960

S = 120

C = 320 – 120 = 200